The following coins are placed in a bag: 1p, 2p, 5p, and 10p. A coin is taken at random and then replaced. A second coin is taken at random and then replaced. Calculate the following probabilities:...

The following coins are placed in a bag: 1p, 2p, 5p, and 10p. A coin is taken at random and then replaced. A second coin is taken at random and then replaced. Calculate the following probabilities: (a) P(1p chosen first and 2p chosen second); (b) P(sum is 3p); (c) P(at least one 10p).