Problem 9. The probability of being able to access the inteth using broadband at each attempt in a certain area is 0.7. A user keeps trying until access is achieved. (a) What is the probability that access will occur in the fourth attempt? (b) What is the probability that more than four attempts will be required before access is attained? (c) If two attempts have already been made, what is the probability that the user will gain access in any of the next four attempts