5(t-5)=5t+40

I NEED HELP!!

(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

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

Use the graph of the sine function y=2sinθ shown below