5. 6.48 Arc-bot Technologies, manufacturers of six-axis, electric servodriven robots, has experienced annual expenses and savings in its shipping department through improved supply-chain software applications.

(a) Determine the number of possible rate of return values.

(b) Find all i* values between 0 and 100%.

Table Summary: Table divided into 3 columns with the headings marked as: Year;

Expenses in dollars; and Savings in dollars.

Year Expenses, $ Savings, $

0 −33,000 0 1 −15,000 18,000 2 −40,000 38,000 3 −20,000 55,000 4 −13,000 12,000