Christopher's Cranks uses a machine that can produce 100 cranks per hour. The firm operates 12 hours per day, five days a week. Due to regularly scheduled preventative maintenance the firm expects the machine to be running during approximately 95% of the available time. Based on experience with other products, the firm expects to achieve an efficiency level for the cranks of 85%. What is the expected weekly output of cranks for this company? a. 4845 b. 5700 c. 6783 d. 969 e. 5100