1. given parallelogram ABCD and AB is 6, the bisector of angle A bisects BC, find BC

2. Given triangle ABC with a perimeter of 25, what is the perimeter of the smaller triangle made by the lines of the midpoints

3. how many combinations can be made if 8 people sat together on one table and three of them always stayed together

4. given a bag of 5 red marbles and 3 yellow marbles, you pick one marble out and throw it back inthe bag and pick out another marble. what is the possiblity that both marbles will be the same color. what happens to the possiblity if the marble you took out the first time was not put back into the bag.

Thanks