ummer 2024 W4 5. Ana notices that people who drive SUVs (S) use a large amount of gas (G) and are in more accidents (A) than the national average. Ana generated the following Bayesian network: S 0.4 f 0.6 S P(AI S) G S P(GI S) 0.75 t 0.8 t 0.25 f t 0.2 f 0.2 t f 0.3 f 0.8 f f 0.7 (a) (3 points) Compute P(a, -s, g) using chain rule. Note, P(a, -s, g) is a short-hand expression for P(A = t, S = f, G =t). (b) (6 points) Compute P(a) using inference by enumeration