1. {213 points] An ioosahedron is a regular polyhedron 1with 21] faces. You have two fair ioosahedral dice, each with faces numbered from 1 to 21:] {each face has the same probability of ending up on top]. You roll them together. {a} {1D points} 1What is the probability that the maximum of the two numbers on top is less than or equal to 1B? {b} {1D points} 1What is the probability that the maximum of the two numbers on top is exactly equal to 1G