Suppose you buy a 950-strike S&R call, sell a 1000-strike S&R call, sell a 950-strike S&R put,

Question:

Suppose you buy a 950-strike S&R call, sell a 1000-strike S&R call, sell a 950-strike S&R put, and buy a 1000-strike S&R put.
a. Verify that there is no S&R price risk in this transaction.
b. What is the initial cost of the position?
c. What is the value of the position after 6 months?
d. Verify that the implicit interest rate in these cash flows is 2% over 6 months. Discuss.