At a large business, employees must report to work at 7:30 A.M. The arrival times of employees forms approximately a bell-curve distribution with mean 7:22 A.M. and standard deviation 4 minutes. (a) Use the 68-95-99.7 rule (also known as the Empirical rule) to determine what percent of employees are late on a typical day. % (b) A psychological study determined that the typical worker needs four minutes to adjust to their surroundings before beginning their duties. Use the 68-95-99.7 rule (also known as the Empirical rule) to determine what percent of this business' employees arrive early enough to make this adjustment before the 7:30 A.M. start time. %