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Question 4 (6 points) S S, = a + BT, E[S, 17,] = a + BT, The diagram above shows the true regression line ES, | 7, ] = a + /7, as well as the estimated line S, = a + /7, , and the points of the first two observations from the dataset, (7 ,S, ) and (72 ,5,). a. Indicate on the graph of and a , and $, and S, . (3 points) b. Also indicate on the graph , 2, e, and ez, where , and e, are the random error term and residual for the ith observation, respectively. (3 points)