I have so much trouble with statistics. It is just not sticking. Can you explain in detail how to solve this?

Discussion 3: (Side Effect... only 10%?) A Statopia drug company advertises that a new product is effective in the treatment of a particular serious disease. However, the rm also states that undesirable side effect occurs in 10% of the patients treated. If a physician has 20 unrelated patients for whom she could prescribe the drug, 1. Does this procedure result in a binomial distribution? 2. If this procedure does result in a binomial distribution, identify the values of n, p, and q. 3. What is the expected number of patients who will experience the side effect, if the company's claim about the side effect is true? 4. What is the standard deviation of patients who will experience the side effect, if the company's claim about the side effect is true? 5. What are the minimum and maximum usual values? 6. Based on minimum and maximum usual values, what might you conclude concerning the drug fIrm's claim? 7. What is the probability that 15 or more of them will experience the side effect, if the company's claim about the side effect is true? 8. Suppose the physician treated all 20 patients and observed the indicated side effect in 15 out of 20. What might you conclude concerning the drug fIrm's claim? (based on the answer from part g)