The SAR's for four consecutive annual returns for APP are $-2\mathrm{.}1,-1\mathrm{.}5,-3\mathrm{.}5$ and $-1\mathrm{.}2.$ What is the standardized cumulative abnormal return $($SCAR$)$ for this series?

Type in your answer as a decimal, rounded it off to $4$ decimal places.