ACME Internet Services offers residential broadband services and guarantees compensation for service delays if service calls cannot be resolved within an hour. Determine the narrowest time range that encompasses 50% of all service calls handled by ACME Internet Services (Assume that service call durations follow a normal distribution with an average of 53 minutes and a standard deviation of 14 minutes). a. 12.14 b. 14.33 C. 18.89 O d. 17.65 O e. 20.14 O f. 12.65