In 1975 interest rates were 7.85% and the rate of inflation was 12.3% in the United States What was the real interest rate in 1975? How would the purchasing power of your savings have changed over the year? (Note: Be careful not to round any intermediate stops loss than six decimal places) What was the real interest rate in 1975? Real rate of interest in 1975 was []% (Round to two decimal places) How would the purchasing power of your savings have changed over the year? The purchasing power over that your did the following (Select the best choice below) O A. Increased by 4.45% OB. Increased by 3.96% O c. Declined by 4.45% OD. Declined by 3.96%