In Sault Ste. Marie, Ontario, an accounting firm's HR records indicates that on any given day, about 1% of their day shift (8:00 am - 4:00 pm) employees will miss work and 2% of their night shift (4:00 pm - 11:30 pm) will miss work. Sixty percent of the employees work the day shift. a) Is absenteeism independent of shift worked? Explain. b) What percent of employees are absent on any given day?