Any Help??

A) 1 - 7/10 = 3/10
B) 1 - 4/5 = 1/5
C) P(2|1) = P(1&2)/P(1) = (P(1) +P(2) -P(1+2))/P(1) = (0.7 +0.8 -0.9)/0.7
.. = 6/7
D) P(2|1') = P(1'&2)/P(1') = (P(2) -P(1&2))/(1 -P(1)) = (.8 -.6)/.3 = 2/3
E) Along a horizontal line across the middle of the diagram the numbers that go in the spaces are 0.1, 0.1, 0.6, 0.2, (0.1--same space as the first)