REVIEW QUESTION, I NEED TO KNOW HOW TO GET TO THE ANSWER. MY FINAL IS HOURS! Please note formulas if possible.

Julie Moon is an energy analyst examining electricity, oil, and natural gas consumption in different regions over different seasons. She ran a regression explaining the variation in energy consumption as a function of temperature. The total variation of the dependent variable was 140.58, the explained variation was 60.16, and the unexplained variation was 80.42. She has 60 monthly observations.

a. Compute the coefficient of determination. (Answer provided is 0.4279)

b. What was the sample correlation between energy consumption and temperature? (Answer provided is 0.6542)

c. Compute the standard error of the estimate of Moons regression model. (Answer provided is 1.1775)

d. Compute the sample standard deviation of monthly energy consumption. (Answer provided is 1.544)