Asset Class	Expected Ret.	St Dev	US Equity	Foreign Equity	Bonds	REITs	Commodities
US Equity	12.94%	15.21%	1
Foreign Equity	12.42%	14.44%	0.62	1
Bonds	5.40%	11.10%	0.25	0.06	1
REITs	9.44%	13.54%	0.56	0.4	0.16	1
Commodities	10.05%	18.43%	-0.02	0.01	-0.07	-0.01	1
LTP	11.65%	12.02%
STP	3.20%	0%
Correlation between STP and LTP	0%
Complete Portfolio Weight	STP Weight	LTP Weight	Expected Return	Risk
100%	100%	0%	1.60%	0.00%
100%	90%	10%	2.02%	0.82%
100%	80%	20%	2.45%	2.62%
100%	70%	30%	2.87%	4.54%
100%	60%	40%	3.29%	5.99%
100%	50%	50%	3.71%	6.61%
100%	40%	60%	4.14%	6.28%
100%	30%	70%	4.56%	5.12%
100%	20%	80%	4.98%	3.48%
100%	10%	90%	5.40%	1.98%
100%	0%	100%	5.83%	1.44%

I need help with this Partners Healthcare case study for my investments class. My professor said our equations for Expected Return and Risk are incorrect in the second chart "Complete Portfolio Weight". I have bolded this section. My professor only said "your equation is wrong" and walked away. so please help. if you can show the excel equation it would be appreciated.