Question 6 16.67 pts 5 Compute (2 - 3xy + y' + 3x + 5y - 4) di dy. 3 3 O 73 3 O 79 3 O 471 8 O -3\fCalculate the total differential of z=xytry' - 5x2 - 3xy + 4y' -10x -14y - 30. O (x2 + 2xy - 3x + 8y - 14) de + (2ry + 32 -10r - 3y - 10) dy O (2xy + y - 10x - 3y - 10) dr + (x2 + 2ry - 3x + 8y -14) dy O (-2x - 2y + 3) dz O (2x + 2y - 3) dz Question 4 16.67 pts Estimate the value of v954.81 + 1528.81 by using differentials with regard to the function f(x, y) = Vx2 +y. Hint: 954.81 = (30 + 0.9)2 and 1528.81 = (40 - 0.9)2. O 49.84 O 49.82 O 49.81 O 49.83