please use javascript so answear the question.

Create a function called tell_user() that pops up an alertbox with some inspirational message. Call the function to make sure it works. Create a function called square_it() that takes one argument: an integer. The function will compute the square of the number and return this as its return value and then alert() the results to the user. parselnt (prompt("Please enter an integer to square: ", "")): Create a function that takes a single argument: a phone number. The function should return true if the phone number has either seven digits or ten digits, false otherwise. Create a function that takes a sentence. The function should return true if the string contains the substring "sample", false otherwise