What type of loop, such as counter control or sentinel control, will you use in each of the following situations? a. Sum the following series: 1 + (2 / XXXXXXXXXX / XXXXXXXXXX / XXXXXXXXXX /...

What type of loop, such as counter control or sentinel control, will you use in each of the following situations?
a. Sum the following series: 1 + (2 / 1) + (3 / 2) + (4 / 3) + (5 / 4) + ... + (10 / 9)
b. Sum the following numbers, except the last number: 17, 32, 62, 48, 58, -1
c. A file contains employees’ salary. Update employees’ salary.