Please help me solve the below 3 questions.

For a sample of 41 New England cities, a sociologist studies the crime rate in each city as a function of its poverty rate and its median income. He finds that SSE = 4182,663 and SST= 7,732,451. a. Calculate the standard error of the estimate. (Round your answer to 4 decimal places.) Standard Error OK nt int ences b-1. What proportion of the sample variation in crime rate is explained by the variability in the explanatory variables? (Round your answer to 4 decimal places.) Explained proportion b-2. What proportion is unexplained? (Round your answer to 4 decimal places.)