Need some help with the following questions, thanks!

Question 9 Real GDP means GDP: O valued at prices at which goods are actually sold. O that does not change from year to year. O corrected for changes in quality. O valued at prices in a base year. Question 10 Which of the following statements is true? O Real income is the actual number of dollars received over a period of time. O The consumer price index (CPI) measures changes in the average prices of consumer goods and services. O Deflation is an increase in the general level of prices. O Disinflation is an increase in the rate of inflation. O The real interest rate equals the nominal rate of interest plus the inflation rate