Final answer:
The firm should not make the investment as the rate of return is lower than the cost of borrowing.
Step-by-step explanation:
To determine whether the firm should make the investment, we need to compare the rate of return on the investment with the cost of borrowing. The investment will earn a 6% rate of return, while the cost of borrowing is 8%. Since the rate of return is lower than the cost of borrowing, it is not financially beneficial for the firm to make the investment at this time.