4. Answer the following questions using belief networks shown below: Pollution (P[p True) 0.7 Smoker (PIs*T)-0.3 Cancer XRay Dyspnoea Find the probability of John is having a cancer given that he is a smoker and the XRay turns positive Find the probability of John is not having a cancer given that he is a smoker and and living in a place with high pollution and the XRay turns positive a. b. The joint distributions are given as following Pollution Smoker P(C-TruelP,S) Cancer | P(D= TruelC 0.65 0.30 Cancer |P(X-posIC) 0.9 0.2 0.05 0.02 0.03 0.001 4. Answer the following questions using belief networks shown below: Pollution (P[p True) 0.7 Smoker (PIs*T)-0.3 Cancer XRay Dyspnoea Find the probability of John is having a cancer given that he is a smoker and the XRay turns positive Find the probability of John is not having a cancer given that he is a smoker and and living in a place with high pollution and the XRay turns positive a. b. The joint distributions are given as following Pollution Smoker P(C-TruelP,S) Cancer | P(D= TruelC 0.65 0.30 Cancer |P(X-posIC) 0.9 0.2 0.05 0.02 0.03 0.001