$7.$ Sentinel While Loop a$)$ Implement a while loop to request numbers from the console and insert them into a list. b$)$ Insert all the numbers into a list. c$)$ Stop requesting values if the user input is a zero $(0).$ d$)$ Print all elements of the list, sum and average. Note that $0$ should not be added to the list. Input text can be any content. Just make sure to precisely match the output format below.