relatively safe, but you wan to demonstrate that his risk would be even lower if he were more diversified. You obtain the following returns data for West Coast Bank WCBI. Both banks have had less variabiliy than most other stocks over the past $5$ years. Measured by the standard deviation of returns. by how much would your uncles risk have been reduced if he had held a portfolio consisting of $549$ in ECB and the remainder in WCB$?($Hinc Use the sample standard deviation formula $)$ Do not round your intermediate calculations.

$\backslash$table$[[$Mear$,$Ecs,VCB$],[,$Go DoO,$40\mathrm{.}00c8$