:1. The list 1,3,4,5,7 has an average of 4 and an SD of 2. The
list 6,18,24,30,42 has

a. an average of 24 and an SD of 2
b. an average of 4 and an SD of 12
c. an average of 4 and an SD of 2
d. an average of 12 and an SD of 4
e. an average of 24 and an SD of 12