Python

Instead of directly providing the discount rate, you may want to compute it based on the risk-free rate, the equity risk premium, and your project's beta with respect to the equity market return. Please write a function that takes the risk-free rate, the equity risk premium, the beta, and the list cashflows as inputs and returns the NPV. Set default values of 0 for the risk-free rate and 1 for the beta, such that the function can be called without specifying these parameters. Make use of the function you wrote in 1 by calling it after calculating the discount rate.