clear answer, please and I need R cod.

Consider the echolocation data available in the file "case 1002.csv". The data contains the body mass and flight energy expenditure for 20 different species from three categories of flying vertebrates: echolocating bats, non-echolocating bats, and non-echolocating birds. In class we considered the model M{lenergy|lmass, bird, ebat} = Be + Bilmass + Bybird + Bjebat and discussed that the coefficient Bs represents the difference in the mean log-energy expen- diture between echolocating bats, and non-echolocating bats. But how about the difference in the log-energy expenditure between echolocating bats and non-echolocating birds? In this homework we will learn how to construct a confidence interval for the difference 33 - B2, given by the formula (33 32) Etn-p-1.a/2SE(33 32) 2. Fit in R the model *{log Energy log Mass, bird, ebat} = Bu + Bilmass + Bebird + Bjebat Print the summary output of the model, and compute the difference 3s - 32. Mass Type Energy 779 non-echolocating bats 43.7 628 non-echolocating bats 34.8 258 non-echolocating bats 23.3 315 non-echolocating bats 22.4 24.3 non-echolocating birds 2.46 35 non-echolocating birds 3.93 72.8 non-echolocating birds 9.15 120 non-echolocating birds 13.8 213 non-echolocating birds 14.6 275 non-echolocating birds 22.8 370 non-echolocating birds 26.2 non-echolocating birds 25.9 384 442 non-echolocating birds 29.5 412 non-echolocating birds 43.7 330 non-echolocating birds 34 480 non-echolocating birds 27.8 93 echolocating bats 8.83 8 echolocating bats 1.35 6.7 echolocating bats 1.12 7.7 echolocating bats 1.02 Consider the echolocation data available in the file "case 1002.csv". The data contains the body mass and flight energy expenditure for 20 different species from three categories of flying vertebrates: echolocating bats, non-echolocating bats, and non-echolocating birds. In class we considered the model M{lenergy|lmass, bird, ebat} = Be + Bilmass + Bybird + Bjebat and discussed that the coefficient Bs represents the difference in the mean log-energy expen- diture between echolocating bats, and non-echolocating bats. But how about the difference in the log-energy expenditure between echolocating bats and non-echolocating birds? In this homework we will learn how to construct a confidence interval for the difference 33 - B2, given by the formula (33 32) Etn-p-1.a/2SE(33 32) 2. Fit in R the model *{log Energy log Mass, bird, ebat} = Bu + Bilmass + Bebird + Bjebat Print the summary output of the model, and compute the difference 3s - 32. Mass Type Energy 779 non-echolocating bats 43.7 628 non-echolocating bats 34.8 258 non-echolocating bats 23.3 315 non-echolocating bats 22.4 24.3 non-echolocating birds 2.46 35 non-echolocating birds 3.93 72.8 non-echolocating birds 9.15 120 non-echolocating birds 13.8 213 non-echolocating birds 14.6 275 non-echolocating birds 22.8 370 non-echolocating birds 26.2 non-echolocating birds 25.9 384 442 non-echolocating birds 29.5 412 non-echolocating birds 43.7 330 non-echolocating birds 34 480 non-echolocating birds 27.8 93 echolocating bats 8.83 8 echolocating bats 1.35 6.7 echolocating bats 1.12 7.7 echolocating bats 1.02