Can you please help me ASAP

Diana is painting statues she has 7/8 of a liter of paint each statue requires 1/20 of a liter of paint how many statues can she paint?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

An arithmetic series a consists of consecutive integers that are multiples of 4 what is the sum of the first 9 terms of this sequence if the first term is 0