The number of viewers of a television series introduced several years ago is approximated by the function N(t)=(50 +7t) (1sts 26) where N(t) (measured in millions) denotes the number of weekly viewers of the series at the end of the tth week. (a) Find the rate of increase of the weekly audience at the end of week 24. Round your answers to three decimal places. --Select-- (b) How many viewers were there in week 24? Round your answers to one decimal place. -Select- v