The following statistics and estimates were compiled by Big Moon Bank regarding a proposed new branch office and the bank itself:

Branch office expected return $=15\%$

Standard deviation of branch return $=8\%$

Existing bank$$s expected return $=10\%$

Standard deviation of existing bank$$s return $=5\%$

Branch asset value as a percentage of total bank assets $=16\%$

Correlation of net cash flows for branch and bank as a whole $=+0\mathrm{.}48$

What will happen to Big Moon$$s total expected return and overall risk if the proposed new branch project is adopted? $($Please show your work in detail for full credits$)$