1.A five sided die with the sides showing the numbers 1 through 5.If you have two die and roll both of them,

a.List the events that would have to occur for the sum of the die to equal eight.

b.What is the probability of that the event of the die adding up to eight happening,p(sum of 8)= ?

c.Draw a tree diagram for this sample space.

2. A box containing 4 red marbles and 2 black marbles.Consider the two stage experient of randomly selecting a marble from the box,replacing the marble and randomly selecting a second time. 

a.What is probability of selecting a red marble first and then a black marble second? P(R,B)=?

b.What is the probability of selecting one red marble? P(R)=?

guys plz help me,it's due after thanx givin'.