5.28 Medical Bills Records show that 30% of all patients admitted to an alternative medicine clinic fail to pay their bills and that eventually the bills are for- given. Suppose n=4 new patients represent a random selection from the large set of prospective patients served by the clinic. Find these probabilities:

a. All the patients' bills will eventually have to be forgiven.

b. One will have to be forgiven.

c. None will have to be forgiven.