Park Co. is considering an investment that requires immediate payment of $20,957 and provides expected cash inflows of $6,900 annually for four years. Assume Park Co. requires a 9% return on its investments. 1-a. What is the internal rate of return? (PV of $1. FV of $1. PVA of $1, and FVA of $1) (Use appropriate factor(s) from the tables provided. Round your present value factor to 4 decimals.) 1-b. Based on its internal rate of return, should Park Co make the investment?