part a

public static boolean isLeapYaer(int year)

Write the static method isLeapYear(int year) which returns true or false.

a year is leap year if

• It is divisible by 4
• However, if it is also divisible by 100 it is not a leap year
• Unless it is divisible by 400, in which case it is a leap year

example calls:

• isLeapYear(2020) → true
• isLeapYear(1900) → false
• isLeapYear(2000) → true
• isLeapYear(2023) → false
• isLeapYear(2100) → false

part b

public static int numbrOfLeapYears(int year1, int year2)