Saladin is willing to lend her friend Astro $500 to buy a new smart phone. Saladin wants a 3% real rate of return on the loan when it is paid back at the end of the year. She believes that during the year the general level of prices will rise by 2%, so she should charge her friend Astro a nominal interest rate of:a. 5%.b. 4%.c. 3%.d. 2%.