4. (3 marks) In the infinite-horizon model of LN 4, we defined Pt+1 = Ri+1, where Rt+1 = 1+rt+1, and rt+1 is the interest rate from t to t+1. What is Pe+1 the effective price of and in terms of what)? Explain (briefly). 4. (3 marks) In the infinite-horizon model of LN 4, we defined Pt+1 = Ri+1, where Rt+1 = 1+rt+1, and rt+1 is the interest rate from t to t+1. What is Pe+1 the effective price of and in terms of what)? Explain (briefly)