A student intern at the investment firm of Hamid and Associates was given the assignment of determining whether there is a correlation between the number of individual stocks in a client's portfolio (x) and the annual rate of return (y) for the portfolio. The intern selected a simple random sample of 10 client portfolios and determined the number of individual company stocks and the annual rate of return earned by the client on his or her portfolio. Number of Stocks Rate of Return 0.13 0.16 0.21 0.18 0.18 0.19 0.15 0.17 0.13 0.11 a. Calculate the coefficient of correlation and interpret the result. b. Calculate the coefficient of determination and interpret the result. c. Determine whether there is significant correlation between the two variables at 5% significance level. d. Can we apply simple regression to the same set of data