please help the probability questions, thanks

There are 4 red cards, 8 yellow cards, 3 black cards, and 5 white cards in a game box.

If you gain 5 points for the red card, 3 points gain for the yellow card, 2 points gain for the black card, and 4 points for deducting the white card,

(a) Write down the form on the table, and fill in the probability and score in the following table: (4 points)

Probability score

Red card

Yellow card

Black card

White card 1/4 -4

(b) Find the expected value of the score for a card drawn. (5 points)

(c) If Nobita has to use 1 point in exchange for a card from the game box, would you suggest that he participate in this game? why? To make this game fair, how many points should be used for each card drawn?