Your task is to write and test a function which takes three arguments (a year, a month, and a day of the month) and returns the corresponding day of the year (for example the 225th day of the year), or returns None if any of the arguments is invalid. Hint: You need to find the number of days in every month, including February in leap years.

Fast answer i need for apex ! smartphones should be banned from the classroom in public schools so that students cannot cheat on test so easily? which is an example of a counter argument to the thesis above? a. the classroom is a place for learning not for making phone calls b. smartphones are useful learning tools in the modern classroom c. banning smartphones will not students pay attention to teachers any better d. banning smartphones would decreased incidents of theft