5. (15) What is the total time per unit required to complete the first 4 units of a production process if the first unit requires 16 hours and the learning curve has a slope parameter of 75 ( = 0.75)? Hint: time per unit = K * (unit number) raised to the nth power. Your answer is most nearly? a. 40 hrs b. 50 hrs c. 60 hrs d. 70 hrs e. 80 hrs