PLS HELP WILL MARK YOU BRIANLIEST

Katlyn made 4 dresses with 7 yards of fabric. how many yards did she use on 1 dress?

(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

At a book fair, joe bought 24 books at 3 for $5 and had $2 left. how much money did he have at first?