7'7 Consider a random procedure of tossing a fair coin four times. Let x be the number of heads occur. a. Complete the set to form the sample space consisting of 16 outcomes {5 = {HHHH, HHHT, ...}j. Create the probabilityr distribution of the random variable it. Find the probability of getting at least two heads [or P(x 2 2)]. Find the probability of getting at most one head [or P(x E 1)] . Find the mean} variance and standard deviation the random variable )L EDP-FF