Chinese New Year and Mathematics

Chinese New Year is round the corner! How about a question to tease your brain before you go visiting?

Yingjie's parents have each prepared four different red packets for the Chinese New Year. These red packets each contain different amounts of money: $8, $10, $20 and $50. Yingjie is asked to pick one red packet from her mother and another one from her father. Find the probability that

(a) she will get the maximum amount of money from her parents ($50 from her mother and $50 from her father).

(b) she will get 2 red packets of the same amount.

(c) she will get 2 red packets of different amounts.