At the local cell phone store, the probability that a customer who walks in will purchase a new cell phone is 0.2. The probability that the customer will purchase a new cell phone protective case is 0.25. Is this information sufficient to determine the probability that a customer will purchase a new cell phone and a new cell phone protective case? If so, find the probability. If not, explain why not. (Hint: Considering the buying practices of consumers in this context, is it reasonable to assume these events are independent?)