n the year of 2019, the U.S. economy produced a total output of $20.75 trillion. During the same year, the U.S. federal government spent $7.88 trillion. The desired consumption and desired investment in the U.S. for the year is described by: Cd=15-150r, Id=10-200r Where Cd is the desired consumption in trillions of $, Id is the desired investment in trillions of $, and r is the real interest rate in decimal form. if the average real interest rate during the year 2019, is 4.1%, how much is the desired national saving, Sd, in trillions of $? round answer to at least 2 decimal places.

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