6) A) - 7 COS 4 B) - 7 COS 4 C) -72 Cos 4 D) -72 cos 4 Solve the problem. 7) Rewrite the integral 7) s's 8(1 - z/7) 3(1 - y/8 - z/7) dx dy dz in the order dz dy dx. 8(1 - x/3) 3(1 - x/3 - y/8) dz dy dx 8(1 - z/7) 3(1 - y/8 - z/7) dz dy dx 8(1 - x/3) 7(1 - x/3 - y/8) dz dy dx -3 (8(1 - 217) 7(1 - y/8 - z/7) dz dy dx 0 Evaluate the integral by changing the order of integration in an appropriate way. of's' ('xsin z dz dy dx Z B) A) . 1 - cos 9 B) 1 - sin 9 C) 1 + cos 9 D) 1 + sin 9 2Find the average value of F(x, y, z) over the given region. ") F(x, y, z) = 3x + 10y + 7z over the rectangular solid in the first octant bounded by the coordinate 9) planes and the planes x = 6, y = 8, z =5 A)- 133 B) - 133 3 C) 2 293 2 2 10) F(x, y, z) = 7x + 5y + 4z over the cube in the first octant bounded by the coordinate planes and the 10) planes x = 6, y = 6, Z =6 A) 12 B) 63 C) 24 D) 48 Evaluate the cylindrical coordinate integral. 0 8/r 11) dz r dr de 11) 7/r A) 2n B) 4T C) 28TL D) 14n 12) S SS 5/r sin 0 dar dr de 12) 0 A) 60 B) 60n C) 20r D) 40