The total U.S. personal income I (in billions of dollars) from 1960 and projected to 2024 can be approximated by I = 533.6(1.065)^t where t is the number of years after 1960 (Source: U.S. Bureau of Labor Statistics).

(a) What t-values correspond to the years 2000, 2014, and 2024?

(b) What does the formula estimate the total U.S. personal income to be in 2000, 2014, and 2024?

(c) The U.S. total personal income given by the U.S. Bureau of Labor Statistics for 2018 is $19,129.6 billion. What does the formula estimate it to be in 2018?