Task $3$: ValidDate $()$

Write a method called ValidDate that checks if a date is valid after the first Millennium $($the year $1000).$ The method takes three integers for the day, month, and year of the date. It should return true if the date is valid; false otherwise.

$$ A valid month can be indicated with a Boolean monthValid, set to true, if the month entered is between $1$ and $12,$ inclusive.

$$ A valid year can be indicated with a Boolean yearValid, set to true if the year is greater than $1000$ inclusive.

If that year is a leap year, you can set a Boolean isLeapYear to true; false otherwise.

The leap year rule says that it's a leap year if

a$)$ it's divisible by $400,$ or b$)$ it's divisible by $4$ and it's not divisible by $100.$ So $1600$ and $1512$ are leap years, but $1700$ and $1514$ are not.

$$ A valid day can be indicated with a Boolean dayValid set to true if the day is valid; false otherwise. A valid day is one that is less than or equal to the number of days in the given month:

You can first determine the number of days in the month entered $(30,$ or $31)$ and stores that value in a variable daysInMonth. If the month entered is not valid, daysInMonth should get $0.$ Note that to figure out the number of days in February $(280$r $29),$ you'll need to check if it's a leap year.

If the month, day, and year entered are all valid, return true otherwise, return false.