These are the answers I got in the exam as far as I can remember, I am not saying they are 100% right... Feel free to correct me.
1a) Mean(W)=6 Var(W)=36
b) P(W=4)=0.09938
2a) 95% C.I. [62.542,64.898]
b) n=56
3a) Upper Quartile=41.68625
bi) Probability=0.4168
bii)Probability=0.9066
4a) Ix-yI>1.431
bi) Probability=0.7016
bii) The probability of accepting the incorrect conclusion is very high, meaning the test is not reliable.
5ai) Ho: p=0.7 H1: p<0.7
aii) p-value=0.2178, Insufficient evidence to conclude the gremination rate is not 70%
b) p-value=0.02275, Strong evidence to conclude that the germination rate is les than 70%
6a) P(Y<8)=0.8
bi) Y=20-X
bii) P(XY>64)=0.6
c) E(XY)=200/3