MIN/MAX VALUES GROUP BY ID - sql

Question

Find the names and addresses of the customers with the highest balance and the people with the lowest loan in each branch.
Tables:
CREATE TABLE Branch(
BranchID INT NOT NULL,
Address varchar(100),
ManagerSsn varchar(100),
Branch_name varchar(255),
PRIMARY KEY (BranchID)
);
CREATE TABLE Has_Account(
Assn Int,
ANo CHAR(16),
Opened_date date,
PRIMARY KEY(Assn),
FOREIGN KEY(Assn) REFERENCES Customer(Ssn),
FOREIGN KEY(ANo) REFERENCES Account(AccountNo)
);
CREATE TABLE Account(
AccountNo CHAR(16) NOT NULL,
BranchID Int,
Balance Int,
PRIMARY KEY(AccountNo),
FOREIGN KEY(BranchID) REFERENCES Branch(BranchID)
);
CREATE TABLE Customer(
Ssn Int CHECK(0101000000000 < Ssn < 3112999995999) NOT NULL,
Address VARCHAR(100),
Name VARCHAR(100),
EmployerID Int,
PRIMARY KEY(Ssn)
);
CREATE TABLE Loan(
LoanNo CHAR(16) NOT NULL,
BranchID Int,
Amount Int,
PRIMARY KEY(LoanNo),
FOREIGN KEY(BranchID) REFERENCES Branch(BranchID)
);
CREATE TABLE Has_Loan(
LNo CHAR(16),
Lssn Int,
Repay_date date,
PRIMARY KEY (LNo),
FOREIGN KEY(Lno) REFERENCES Loan(LoanNo),
FOREIGN KEY(Lssn) REFERENCES Customer(Ssn)
);
Populating the tables
INSERT INTO CUSTOMER
VALUES('2004980890999', ‘Kanaribakken 2B’, ‘Paul Stolten’, ‘’);
INSERT INTO CUSTOMER
VALUES(‘1010968250234’, ‘Parkveien 5’, ‘Anders Nilsson’, ‘’, );
INSERT INTO CUSTOMER
VALUES(‘2104996495987’, ‘Kongeveien 24B’, ‘Karoline Torskerud’, ‘123’, );
INSERT INTO CUSTOMER
VALUES(‘2910943135444’, ‘Gåsesmauet 3’, ‘Bente Arildsen’, ‘555’, );
INSERT INTO CUSTOMER
VALUES(‘1304980890678’, ‘Knallebakken 30’, ‘Knut Solberg’, ‘555’,);
INSERT INTO CUSTOMER
VALUES('1019730000234', ‘Laksebakken 40’, ‘Harald Olsen’, ‘’);
INSERT INTO BRANCH
VALUES (‘123’, ‘Børsveien 49’, ‘1412963670786’, ‘Nesttun’,);
INSERT INTO BRANCH
VALUES(‘555’, ‘Vimpelveien 24’, ‘2412983905999’, ‘DNB’,);
INSERT INTO ACCOUNT
VALUES (‘1234567890087620’, ‘123’, ‘459’,);
INSERT INTO ACCOUNT
VALUES (‘8402849284910340’, ‘123’, ‘35120’,);
INSERT INTO ACCOUNT
VALUES (‘3452948293817280’, ‘555’, ‘69’,);
INSERT INTO HAS_ACCOUNT
VALUES(‘1010968250234’, ‘1234567890087620’, ‘17.04.2012’,);
INSERT INTO HAS_ACCOUNT
VALUES (‘2104996495987’, ‘8402849284910340’, ‘20.09.2000’,);
INSERT INTO HAS_ACCOUNT
VALUES (‘2910943135444’, ‘3452948293817280’, ‘29.01.2006’,);
INSERT INTO LOAN
VALUES (‘2291928394039280’, ‘555’, ‘50000’,);
INSERT INTO LOAN
VALUES (‘1295829384932100’, ‘123’, ‘400000’,);
INSERT INTO LOAN
VALUES ('1295829384932222', ‘123’, ‘40000’);
INSERT INTO HAS_LOAN
VALUES (‘2910943135444’, ‘2291928394039280’, ‘09.09.2019’,);
INSERT INTO HAS_LOAN
VALUES (‘2104996495987’, ‘1295829384932100’, ‘14.03.2022’,);
INSERT INTO HAS_LOAN
VALUES ('2004980890999', '1295829384932222', '01.02.2021');
Draft so far:
SELECT DISTINCT Customer.Name, Customer.Address
FROM Customer, Account, Loan, Has_Account, Has_Loan
WHERE Customer.Ssn = Has_Account.Assn AND Has_Account.Assn = Has_Loan.Lssn
(SELECT Account.Balance MAX(Balance) GROUP BY(BranchID)) AND
Loan.AMOUNT(SELECT Loan.Amount MIN(Amount) GROUP BY(BranchID));
I think it is correct that we need to group our output by BranchID, and max/min is ok. Looks like the statement formalities are wrong somehow.
Any help or hint is much appreciated!