Did i get number 2 right or wrong if i got it wrong tell me the answer

Farnesene is a sesquiterpene. how many different isomers arising from double-bond isomerizations are possible? g

(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

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)