Question 1155742
a. 7 ways to choose the first*7 for the second...*7 for the fifth.
That is 16807 ways.
b. that is 7*6*5*4*3=2520 ways
c. that is 1*7*7*7*7=2401 ways
d. That is 7*7*7*7*1=2401 ways
e. that is 7*2*7*7*7=4802 ways