problem 3:Consider the following experiment: There are 4 fair coins placed in a 2 2 matrix configuration. A trial consists of flipping each coin once and recording the resulting outcome as a binary 2 2 matrix where 0 signifies tails and 1 signifies heads. Derive a probabilistic model for this experiment. How many elements are in ?

Problem 4: For the experiment above, determine the probability that in at least one row (of the outcome matrix) all the entries are 1. Solve Problem 4 again using what you learned about how to analyze the reliability of a network.