The Auto Company (AC)had Expected Returns and Realized Returns for the Periods

Essay

The Auto Company (AC)had expected returns and realized returns for the periods shown below:
$\begin{array}{ccc}\underline{\text { Period }} &\underline{ \text { Expected Return} } & \underline{\text { Actual Return }}\\1 & 15 \% & 16 \% \\215 \% & 13 \% & \\3 & 15 \% & 17 \% \\415 \% & 15 \% &\end{array}$
Calculate the cumulative abnormal return for the four periods.