$(6$ pts$)$ Consider the following sample of data representing the annual percent return for

an investment portfolio consisting of Vanguard Balanced Index funds $(60\%$ stocks and

$40\%$ bonds$).$

$10,-2,29,14,22,18,14,-2,-3,-10$

a$.$ Compute the mean percent return.

b$.$ Compute the standard deviation of the percent return.

c$.$ Compute the median of the percent return.