Stats help (combinations/ order prb)

Due in 3 hours….. (1pm mt time)

I have played with these for an hr and i have completed all homework except thiese 2 problems please help.....

Question 1 (complete all 3 parts)

From a group of 9 novels 7 history books and 4 self help books:

A)In how many different ways can 4 books be chosen so that 2 of them are novels and 2 of them are history books?

B) In how many different ways can 5 books be chosen so that there are either 0 or 1 novels ?

C) If 5 books are chosen at random, what is the probability that at least one of each type is chosen?

Question 2 (Completed all 4 parts)

A line is formed from a group of 4 girls and 3 boys:

A) How many different lines begin with a girl and end with a boy?

B) How many different lines have the individuals alternating by gender?

C)If all lines are equally likely, what is the probability that the line begins with a girl and ends with a boy

D)If all lines are equally likely what is the probability that the line begins and ends with individuals of the same gender?