Can someone please help with this question?

Also, attached there is an example. In the example problem I did box in yellow what I dont understand.

Question 5 QUESTION 1 pts 5. You are given a perpetuity, with annual payments as follows: EXAMPLE (1) Payments of 4 at the end of the first year and every three years thereafter. (ii) Payments of 5 at the end of the second year and every three years thereafter. (iii) Payments of 2 at the end of the third year and every three years thereafter. The interest is 7% convertible semiannually. Calculate the present value of this perpetuity. (4.a-c #22] A) 52 B) 42 C) 47 D) 57 E) 63 You are given a perpetuity, with annual payments as follows: (i) Payments of 3 at the end of the first year and every three years thereafter. (11) Payments of 4 at the end of the second year and every three years thereafter. (iii) Payments of 6 at the end of the third year and every three years thereafter. The interest is 7% convertible semiannually. Calculate the present value of this perpetuity (4.a-c #22] - + 4 5 245 2 (nominal) ;" = 7% (sean-ame] j - 3.5% (effective) i = 7.1225% (3 year ) K = 22.9255% D = 4(1-2) + 5(1+i)' + 2 = 11.946217 PV = Pazak = 2 = 52.109