Question $1\mathrm{.}5(20$ Marks$)$ A farming conglomerate is responsible for planting grain crops in Free State. As expected, researchers have noted that the harvest $($sales revenue$)$ is highly dependent on the annual rainfall as depicted on Table $5\mathrm{.}1.$ Demonstrate using the regression model the harvest $($sales revenue$)$ when the amount of rainfall received is $600$mm and $900$mm respectively. The relevant calculation and illustrations should be provided. Sales Revenue $($R$)$ Rainfall $($mm$)200100300300250400200200200100350700$