Below is a framework of a function is Valid Day that checks if a given date of a year is valid. Complete the body of this function so that it will produce a correct answer for any input date. As we know, there are 29 days in the February of a leap year (such as this year, 2016). In order to verify a date, we need to know if a given year is a leap year. A leap year is any year divisible by 4, except that a year divisible tV 100 is not a leap year, except that a year divisible by 400 is a leap year after all. Hence, 1800 and 1900 are not leap years, but 1600 and 2000 are