Three pricing options are available: Silver Plan: $20/month for up to 200 Mb's of service plus $0.16 for each additional Mb of service Gold Plan: $50/month for up to 1000 Mb's of service plus $0.08 for each additional Mb of service Platinum Plan: $100/month for up to 3000 Mb's of service plus $0.04 for each additional Mb of service You have been requested to write a report that answers the following questions in an effort to assist employees in choosing the appropriate pricing plan for their wireless Internet service. (a) If C is the monthly charge for x Mb's of service, express C as a function of x for each of the three plans. (b) Graph each of the three functions found in part (a). (c) For how many Mb's of service is the Silver Plan the best pricing option? When is the Gold Plan best? When is the Platinum Plan best? Explain your reasoning. (d) write a report that summarizes your findings