For f(x) = 5x + 2: a) find f(7)b) find f-1(x)c) find f-1(7)d) find f(f-1(7))(i'm confused and no it's not multiple choice)

Adice game involves rolling two dice. a player who rolls a 3, 4, 10, 11, or 12 wins 5 points. a player who rolls a 5, 6, 7, 8, or 9 loses 5 points. if the expected value of playing this game is to lose , a player will points by rolling a 2.