1. you need to write a loop that will repeat exactly 125 times. which is the preferred loop construct to use? a. while loop b. do while loop c. for loop 2. you need to write a loop that will keep reading and adding integers to a sum, until the sum reaches or exceeds 21. the numbers are all less than 20 and the sum is initially 0. which is the preferred loop construct to use? a. while loop b. do while loop c. for loop