Write (define) a function named count_down_from, that takes a single argument and returns no value. You can safely assume that the argument will always be a positive integer. When this function is called, it should print a count from the argument value down to 0. Examples: count_down_from(5) will print 5,4,3,2,1,0, count_down_from(3) will print 3,2,1,0, count_down_from(1) will print 1,0,

Write a program that prints the day number of the year, given the date in the form month-day-year. for example, if the input is 1-1-2006, the day number is 1; if the input is 12-25-2006, the day number is 359. the program should check for a leap year. a year is a leap year if it is divisible by 4, but not divisible by 100. for example, 1992 and 2008 are divisible by 4, but not by 100. a year that is divisible by 100 is a leap year if it is also divisible by 400. for example, 1600 and 2000 are divisible by 400. however, 1800 is not a leap year because 1800 is not divisible by 400.