Question 4: ( 4 marks) Choose the correct answer and show all the steps. From time 5 to time 10 , payments are made continuously at an annual rate of (3t2+20t), where t is time measured in years. During the period that the continuous payments are made, the force of interest is (0.006t2+0.04t). From time 0 to time 5 , the force of interest is 5%. Calculate the present value at time 0 of the payments. A 374.30 B 376.57 C 378.75 D 480.61 E 483.53