For meg's long-distance calling plan, mostly cost C in dollars is given by the linear function C (t)= 6 + 0.05t, where t is the number of minutes talked. a) What is the total cost of talking 8 hours? of talking 20 hours? b) What is the effective cost per minute (the total cost divided by the number of minutes talked) of talking 8 hours? of talking 20 hours?