8. A person would like to go from place A to place B in the following figure. There are five bridges on different branches of the river. Bridges are independently managed. Let G be the event that there is a path from A to B and let By be the event that kth bridge is open. Bridge : is open with probability P(B.) - 0.3, P(B.) - 0.6, P(B.) - 0.5, P( B.) = 0.4, P(B.) = 0.5. (@) Find P(G). (3 marks) (b) Find P(B, n B. G)