problem2.README

For this problem, you need to read in 4 non-negative doubles, and then print on separate lines: their sum, their mean, and their multiplication, and their geometric mean. The geometric mean just takes the multiplcation and raises it to the (in this case) 1/4 power.

For example, if the numbers are 15, 6, 7.5 and 9.1, then:
sum = 15 + 6 + 7.5 + 9.1 = 37.6
mean = (5 + 6 + 7.5 + 9.1) / 4 = 9.4
multiplication = 15 * 6 * 7.5 * 9.1 = 6142.5
geometric mean = (15 * 6 * 7.5 * 9.1)^(1/4) = 8.85291493609189

Example input:
15
6
7.5
9.1

Example output:
37.6
9.4
6142.5
8.85291493609189