Jinning is going to flip a coin. If the result is “heads,” he wins $\$4$. If the result is “tails,” he loses $\$7$.  

1. What is his expected value per flip?

   Hint (a):

   Find the probability of each flip. Then use that to find the expected value of the flip.

   Answer (a):

   $(0.5)(4)+(0.5)(-7)=-1.50$

2. If he flips the coin $8$ times, how much should he win or lose?

   Hint (b):

   Use the answer from part (a) to help you.