I need help with this two problem please, and please answer all parts and make it legible. This is my third time trying to get help with this kind of problem and every answer so far is marked incorrect.

It For the functions w = 9x2 - 3y2, x = cos t, and y = sin t, express (iiV: as a function of t, both by using the chain rule and by expressing w in terms of t and differentiating directly with respect to t. Then evaluate (1%\" at t = 3. d Express d_vtv as a function of t. dw dt