NEED ANSWERS FOR 1, 2, and 5 you don’t have to do a step by step but if you know the answers please let me know! thank you <3

Acommunity group sells 2,000 tickets for its raffle. the grand prize is a car. neil and 9 of his friends buy 10 tickets each. when the winning ticket number is announced, it is found to belong to neil's group. given this information, what is the probability that the ticket belongs to neil? a.1/5 b.1/10 c.1/200 d.1/4

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Why is x= 4 a solution to the proportion 14/x 56/1 6