Please help me understand the following

9. [20 points] Suppose that the values of y are generated by the following equation: y = a + x + 9 Where a and B are unknown parameters and e is the random error. The first table below presents three observed data points (X and y), along with the predicted values (, and the residuals (u). The lower table shows the estimates of the intercept and slope coefficient (a and B). obs (.9th 05 if In the tables above, do the following: (3) Fill in the four missing values. (b) Based on the values in the table, calculate R2