Here are the percentage returns on two stocks.

Month	Digital Cheese				Executive Fruit
January		17	%			9	%
February		3				1
March		5				5
April		6				14
May		4				2
June		3				5
July		2				4
August		8				2

a-1. Calculate the monthly variance and standard deviation of each stock. (Do not round intermediate calculations. Round your answers to 1 decimal places.)

b. Now calculate the variance and standard deviation of the returns on a portfolio that invests an equal amount each month in the two stocks. (Do not round intermediate calculations. Round your answers to 1 decimal places.)