using R

4) A biologist assumes that there is a linear relationship between the amount of fertilizer supplied to tomato plants and the subsequent yield of tomatoes obtained. Eight tomato plants of the same variety were selected at random and treated, weekly, with a solution in which x grams of fertilizer was dissolved in a fixed of water. The yield, y kilograms, of tomatoes was recorded PlantABCDEFGIH 10 1.5 2.02.53.0 35 4.04.5 9 4.4 5.8 6.6 7.0 7.7.3 7.7 ar a) Fit a simple regression model to the data. (Show hand calculations)? b) Fit a simple regression model to the data (By using R)? c) Indicate why it may not be appropriate to use your equation to predict the yield of a plant treated, weekly with 20 grams of fertilizer