Here are the returns on two stocks.

	Digital Cheese	Executive Fruit
January	+16	+9
February	-2	+1
March	+4	+5
April	+6	+14
May	-5	+3
June	+2	+6
July	-1	-2
August	-7	-1

a. Calculate the variance and standard deviation of each stock.

	Digital Cheese Return	Executive Fruit Return
Variance	???%	???%
Standard Deviation	???	???

b. Now calculate the returns in each month of a portfolio that invests an equal amount each month in the two stocks.

Month	Portfolio Return
January
February
March
April
May
June
July
August