Need help with the top four please!!

Leo is going to use a random number generator 4 0 0 400 times. each time he uses it, he will get a 1 , 2 , 3 , 4 , 1,2,3,4, or 5 5. what is the best prediction for the number of times that leo will get an odd number?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

The function f(x) is shown in this graph the function g(x)=6x