In a germination study, a seed must succeed in three successive stages G1, G2, and G3. The probabilities are P(G1)=0.8, P(G2∣G1)=0.75, and P(G3∣G1∩G2)=0.6. Find the probability that a seed completes all three stages.
a) 0.45
b) 0.48
c) 0.36
d) 0.60