13) A box contains 5 green, 7 yellow, and 10 orange ping pong balls. How many ways can 5 balls be selected, if d) two must be green? e) two are orange and three are yellow? f) one is green and four...

13) A box contains 5 green, 7 yellow, and 10 orange ping pong balls. How many ways can 5 balls be selected, if

d) two must be green?

e) two are orange and three are yellow?

f) one is green and four are orange?

g) three are of one color and two are of another color?