G Sometimes, people consider a simple linear regression model without the intercept term. Given data (x1, y1),(x2, y2), . . . ,(xn, yn), consider the following model yi = βxi + ?i , i = 1, . . . , n where we assume ?i ∼ N(0, σ2 ) and they are independent. (a) (10 pts) What is the distribution of yi? Write down the distribution and parameters. (by) (10 pts) Express the total square error as a function of β and find βˆ that minimizes the tot