(Range and domain function) Help anyone?

If f(x)=2x+2and g(x)=x^3, what is (g•f)(2)

(a) (8%) compute the probability of an even integer among the 100 integers 1! , 2! , 3! , until 100! (here n! is n factorial or n*(n-1)*(n-2) *… 1) (b) (16%) compute the probability of an even integer among the 100 integers: 1, 1+2, 1+2+3, 1+2+3+4, …., 1+2+3+… + 99, and 1+2+3+… + 100

Someone me what is the area of this figure? 18m 18m 8m 16m