Consider the data,

$\backslash$table$[[x_i,1,2,3,4,5,6],[Y_i,1,2,3,4,4,4]]$

Consider this line $wx+b.$ where the $w=\frac{53}{86}$ and $b=\frac{25}{43}.$ Find the mean squared error, where mean squared error can be defined as$.$