The unit normal vector to the surface x + 2 y +z? = 4 at (1, 1, 1) is 24-2 24 2i+2j+2k a) b) v24 c)2i+4 +2k d)=2+ 2 +2k o a o b oc o d the value of curl (gradf)

The unit normal vector to the surface x + 2 y +z? = 4 at (1, 1, 1) is 24-2 24 2i+2j+2k A) B) v24 C)2i+4 +2k D)=2+ 2 +2k O A O B Oc O D The value of curl (gradf), where f = 2x2-3y2 + 4z? is A) 4x-6y+8z B) 4xi-6yj+8zk C)0 D) 3 O A OB Oc O D