Print Or Return

Two functions take the same two whole numbers. show_sum(a: int, b: int) -> None prints their sum and returns nothing; sum_back(a: int, b: int) -> int returns the sum without printing. The driver calls show_sum once, then stores what sum_back returns and prints double that value, so the output is two lines: the sum, then twice the sum. Input: two lines, each an integer, no prompts. Do not change the driver.