7. [2] Consider rounding positive integers to the nearest multiple of ten: if the last digit of a given integer is 1, 2, 3, or 4, the number is rounded down (e.g., 12 is rounded to 10, 193 is rounded to 190, 442 is rounded to 440, etc.); otherwise it is rounded up (e.g., 66 is rounded to 70, 138 is rounded to 140, 5555 is rounded to 5560, etc.) For a given positive integer num return its value rounded to the nearest multiple of ten. Do NOT use Python's round command. Write your own code