The area of a circular region is increasing at 96 t square metres per second. When the area of the region is 64 square metres, how fast, in metres per second, is the radius of the region increasing? Select one: 08 O 4√3 16 06 If x + 2xy-y²= 2, then at the point (1, 1), dy/dx is Select one: O non existent O 3/2 0 01/2 on 4n² lim non +10,000n 2 Select one: Onon existent O 0 O4 O 1 is