Please assist if you can An agribusiness performed a regress

Please assist if you can!

An agribusiness performed a regression of wheat yield (bushels per acre) using observations on 26 test plots with four predictors (rainfall, fertilizer, soil acidity, hours of sun). The standard error was 1.29 bushels. Find the approximate width of a 95% prediction interval for wheat yield. (Round your answer to 2 decimal places.) Find the approximate width using Quick rule. (Round your answer to 2 decimal places.) The quick rule gives a similar result.

Solution

a) width is -2.44 to +2.44

b) using quick rule it is -2.34 to +2.34

c) no