3. (10 points) Given a set of distinct points (Xi, yj), 1-0, m,J = 0, , n, x# x, when I. Construct the two-variable Lagrange polynomial i # k, and y yl whenj lifx, y) such that lulz.-{0 z-zaand VS, ki,s-u.osisn, j 3. (10 points) Given a set of distinct points (Xi, yj), 1-0, m,J = 0, , n, x# x, when I. Construct the two-variable Lagrange polynomial i # k, and y yl whenj lifx, y) such that lulz.-{0 z-zaand VS, ki,s-u.osisn, j