The Table Shows Nominal GDP Data and Real GDP Data

Short Answer

The table shows nominal GDP data and real GDP data. Use this data to answer the following questions.
$$\begin{array} { | c | c | c | } \hline \text { YEAR } & \begin{array} { c } \text { NOMINAL GDP } \\\text { (BILLIONS) }\end{array} & \begin{array} { c } \text { REAL GDP } \\\text { (BILLIONS) }\end{array} \\\hline 1980 & 47.96 & 43.91 \\\hline 1981 & 53.99 & 49.38 \\\hline 1982 & 71.15 & 59.88 \\\hline 1983 & 76.45 & 64.25 \\\hline 1984 & 82.67 & 77.14 \\\hline\end{array}$$ ​
(a) What was the GDP deflator in 1980?
(b) What was the GDP deflator in 1982?
(c) What was the GDP deflator in 1984?