CPM Homework Help : PC Problem 7-122

Álex Rodríguez gets a hit $30\%$ of the time.

Draw a tree diagram to show the possible outcomes of Rodríguez coming to bat three times.
Answer (a):
Tree with 2 branches labeled 0.7 & 0.3, each splits into the same 2 branches, each of the 4 branches split into the same 2 branches again.
Find the probability Rodríguez gets $0$ hits.
Answer (b):
$\left(0.7\right)^3$
Added to tree diagram, shading on 3 top branches each labeled 0.7.
Find the probability Rodríguez gets $3$ hits.
Hint (c):
Added to tree diagram, shading on 3 bottom branches each labeled 0.3.
Find the probability Rodríguez gets $1$ hit.
Hint (d):
3 possibilities. Find each and take their sum.
Added shading on top 3 branches
Find the probability Rodríguez gets $2$ hits.
Hint (e):
3 possibilities. Find each and take their sum.