Genetics question, please help!

Problem 1. Given the following set of data on average daily gain (ADG), days to 230 lb (D230) and backfat thickness (BF) in pigs: Pig # 1 2 3 4 Mean Variance ADG, lb 1.3 0.7 1.2 0.9 1.03 0.08 D230, days 164 181 172 187 176 102 BF, in 1.2 1.1 1.3 1.2 1.2 0.007 A. Calculate the covariance between ADG and D230. Show all your calculations, step by step. B. Calculate the correlation between ADG and D230. Show all your calculations, step by step. Characterize this correlation. C. Calculate the covariance between D230 and BT. Show all your calculations, step by step. D. Calculate the correlation between D230 and BT. Show all your calculations, step by step. Characterize this correlation. E. Calculate the regression of D230 on ADG? What does this value mean? F. Calculate the regression of BF on D230? What does this value mean? G. Predict D230 for a pig with a 1.1 lb ADG and a pig with 0.8 ADG. H. Predict BF for a pig with 184 days to 230 lb and a pig with 170 days to 230 lb. 1. Which of these predictions are more accurate (will be closer to the actual data you will get on those pigs)? Explain you