$3.($Linear Regression Loss Function By Hand$)$ Suppose that you are given two dat$-$

$1+$e$$z

$=5$ and x

a$)$ Write the MSE loss function J$($$)$ with parameters $=$

h$($x$)=$ $$x$.4$

$(1)1(2)1$

apoints defined by the feature vectors x sponding target values of y$(1)=4$ and y$(2)=2.$

using the linear model

b$)$What is the value of this loss function when the current choice of parameters is

$=2?$

c$)$Write the value of the gradient $$J$($$)$ evaluated at the point $=2.$