Help needed with 2 probability questions, pictures below

Given the following data, find the equation of the line of best fit using excel. DATA 1 N W N 9 11 15 22 22 23 29 10 32 Oy = 3.4x - 0.5 Oy= 2.8x + 0.1 Oy= 3.2x - 0.6 Oy= 3.1x - 0.4For the line of best fit in the least-squares method, O a) the sum of the squares of the residuals has the greatest possible value O b) the sum of the squares of the residuals has the least possible value O c) the sum of the residuals is equal to one O d) both b) and c)