According to these electron configuration, which element in group 15 would have the largest atomic radius?

a. [ne] 3s^2 3p^3
b. [he] 2s^2 2p^3
c. [ar] 4s^2 3d^10 4p^3
d. [kr] 5s^2 4d^10 5p^3
e. [xe] 6s^2 4f^14 5d^10 6p^3

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?