UML diagram analysis: refer to the following UML diagram of the Loan Class. a) How many instance variables does the class have? b) How many methods that return a value? c) How many static methods? d) How many constructors? e) How many default data fields? Loan -annu a lInterestRate: double - nu m ber fy ears: int - loan Amount: double - loan Date: Date + Loan () +L oan (an nu a lInterestRate: double, num ber fy ears: int, lo an A mount: double) +getA n nu a lInterestRate(): double + getNum bero fy ears(): int + getLoan A mount(): double + getLoan Date(): Date + setAnnualInterestRate annualInterestRate: double): void + set Numbero fy ears num bero fy ears: int): void + setLoan Amount loan A mount: double): void + getM onthly Payment(): double + g ett otalPayment(): double