Stock $M$ and Stock $N$ have had the following returns for the past three years: $12$ percent, $-10$ percent, $32$ percent; and $15$ percent, $6$ percent, and $24$ percent, respectively. Calculate the covariance between the two securities$.($lgnore the correction for the loss of a degree of freedom set out in the text.$)$

Multiple Choice

$-99\%$

$126\%$

$250\%$

$-250\%$