I need help with this

Q1) What is the total percentage return for an investor who purchased a stock for $8.77, received $1.53 in dividend payments, and sold the stock for $8.31 ? (2 points) Q2) A stock had the following annual returns: 03.60%,10.14%,19.76%, and 13.73%. What is the stock's: a) expected return? (1 point) What is the stock's: b) variance? (1 point) What is the stock's: c) standard deviation? (1 point) Q3) A stock has monthly returns of 03.84%,01.88%,12.83%, and 25.72%. What is the stock's geometric average return? (2 points) Q4) A stock has an expected return of 02.25% and a standard deviation of 09.53%. For this stock, what are the: a) Upper range of 68% confindence interval ( 0.5 points) b) Lower range of 68% confindence interval: ( 0.5 points) c) Upper range of 95% confindence interval: ( 0.5 points) d) Lower range of 95% confindence interval: ( 0.5 points) e) Upper range of 99% confindence interval: ( 0.5 points) f) Lower range of 99% confindence interval: ( 0.5 points)