7. What is the next fraction in each of the following patterns?
a. 1/40, 4/40, 9/40, 25/40
b. 3/101, 4/101, 7/101, 18/101, 29/101
c. 54/1, 10/2, 9/2, 18/4, 17/8, 34/32 33/256