10. Consider the curve C = {y-x2 = 1} and the vector field F(x, y) = (}, -7). Which points along the curve C is the vector field F tangent to C? A. The vector field is never tangent to C B. Every point of the form (0, y). C. Only the points (0, 1), (V3, -2) , (Vi,-2) D. Only the point (0, 1) E. Only the point (-2, 5)9. Consider the top half (y 2 0) of the region between two circles of radii a and a + 1. Assuming this region has density p(r, y) = veep: what value of a allows the centroid to be at location (I, y) = (0, _)? A. 0 B. 2 C. 5 D. T E. 2x