f(.:c, y) : m2 | Sin(my), 213(t) : St | 5, and y(t) : 7t2 | 4t. The parametric curve C(t) : ($05), y(t), f(m(t), y(t))) lies on the surface 2 : at, y). Find the tangent vector to this curve at t : 1. Tangent vector : ( C], 8,8 )