: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