I keep trying this question but get lost and could use some help please, Thankyou

In a group of 9 students, there are 4 females and 5 males. {a} State how many different committees consist of 2 or 3 students? {b} State how many different 4-member committees have 2 females and 2 males? {c} Determine the probability that a 4-member committee chosen at random from this group will consist of 2 males and 2 females