Carlos is searching for a stock to include in his current stock portfolio. He is interested in Hi-Tech Inc.; he has been impressed with the company's computer products and believes Hi-Tech is an innovative market player. However, Carlos realizes that any time you consider a technology stock, risk is a major concern. The rule he follows is to include only securities with a coefficient of variation of returns below 1.04. Carlos has obtained the following price information for the period 2015 through 2018: What is the rate of return for year 2015? (Round to two decimal places, and do not include '%' sign in your response). What is the rate of return for year 2016? (Round to two decimal places, and do not include '%' sign in your response). What is the rate of return for year 2017? (Round to two decimal places, and do not include '%' sign in your response). What is the rate of return for year 2018? (Round to two decimal places, and do not include '%' sign in your response). What is the average return over this time period? (Round to two decimal places, and do not include '%' sign in your response). What is the standard deviation of returns over these 4 years? (Round to two decimal places, and do not include '%' sign in your response). What is the coefficient of variation of returns for Hi-Tech stock? (Round to two decimal places, and do not include '%' sign in your response).

Year 2015 2016 2017 2018 Stock price Beginning $14.63 $21.98 $63.43 $72.24 End $21.98 $63.43 $72.24 $90.76