How would u compute 5a and questions like 3 & 4?

3. (4 points) Verify that the point (1, 2) lies on the curve (4 - xy)2 = 2y. Then find at the point (1, 2). 4. (4 points) Verify that (0, 1) is a point on the curve t3 = _t+ 3s t - s Then find - at the point (0, 1). 5. (6 points) Consider the equation r2 + 2svt = rt (a) (3 points) Treat s as a constant and compute