. . 4) A local hemodialysis center is going to purchase the following systems which consists of: 10 machines @ $25,000.00 each 1 network server @ $5,000.00 Appropriate network hardware and software @ $500.00 per machine (the server software was included with the hardware costs) The business will contract with the supplier for network maintenance @ $50.00 per month for each workstation and the server, the payments are due at the end of each month of operation. At the end of three (3) years the center expects to upgrade their machines and will receive $10,000.00 for each machine towards the purchase of a new system. a) Draw a time line for the economic transactions for this center's machines. b) Determine the present worth of all payments and receipts for this system if money earns 7.0% annual interest, and compounding is done monthly