Write inequalities to describe the following sets. a. The interior of the sphere of radius 4 centered at the point (3,6,2) b. The exterior of the sphere of radius 4 centered at the point (3,6,2) a. Choose the correct inequality. OA. (x+3)+(y+6) + (z+2) 1 OB. (x-3)+(y-6)+(2-2) 16 2 2 OD. (x+3)+(y+6) + (z+ 2) 16