PLS HELP WITH SCREENSHOT I WILL MARK BRAINLIEST ASAP

(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

When 142 is added to a number the result is 64 more then 3 times the number. option 35 37 39 41

State one method by which you can recognize a perfect square trinomial.