Please provide the steps and the code.

$12\mathrm{.}69$ An article in the Journal of Pharmaceutical Sciences $($Vol$.80,1991)$ presents data on the mole fraction solubility of a solute at a constant temperature. Also measured are the dispersion $x_1$ and dipolar and hydrogen bonding solubility parameters $x_2$ and $x_3.$ A portion of the data is shown in the table below. In the model, $y$ is the negative logarithm of the mole fraction. Fit the model

$y_i={}_0+{}_1{x}_{1i}+{}_2{x}_{2i}+{}_3{x}_{3i}+lo{n}_i,$

for $i=1,2,$dots,$20.$

$\backslash$table$[[$Obs$.,y,x_1,x_2,x_3$