first period, $25 in the second, and $0 in the last one. Inflation and expected inflation are equal to zero, and so is the real interest rate. The present discounted value of labor income is $ at the beginning of the first period of life. (Enter your response as a whole number.) If consumption is equal in all three periods, the highest sustainable level of consumption per period is $. (Enter your response as a whole number.) to maintain a certain level of consumption.) Youth saving =$. (Enter your response as a whole number and include a minus sign if necessary.) Middle-age saving = (Enter your response as a whole number and include a minus sign if necessary.) Old-age saving =$ (Enter your response as a whole number and include a minus sign if necessary.)