Best Bectronics offers a "no hassle" retuins policy. The number of hems reburned per doy follows the normal distritation. The miean n. In what percentage of the days 6 of fewer customers reduening items? (Round kacore computmion to 2 decimal plocas and the finnt anwwer to 2 decimel places.) Percentage b. In what percentage of the days between 11 and 15 customers tetuming items? (Round z score computation to 2 decimat piocer and the final antswer to 2 decimal ploces.] Percentage c. Is thete ary chance of a doy with no cetums