can u answer this math question?

Question

70% of the students in the class do homewok three or more nights each week. Of the students who do homework three or more nights each week, half do homework five nights each week.

A. What fraction of the students in the class do homework five nights each week? Explain you reasoning.

B. What percantage of students in the class do homework. three or four nights a week? Explain your reasoning.

C. From the information provided, can you tell how many students are in the class? Explain why or why not.

Answer 1

y = all students

A.
70%y x 50%

B.
70%y x 50%

C.
s = students who do homework five nights each week
s ÷ 50% ÷ 70% = y

or

u = students who do homework three or four nights each week
u ÷ 50% ÷ 70% = y

or

f = students who do homework three or more nights each week
f ÷ 70% = y

Answer 2

no beacasue it doesn't say how many people are in the class