I need help with these two problems please, and please answer all parts and make it legible.

For the function f(x,y,z) = 2 + xy - 5z*, find fx , fy, and fz f =1|: w dw For the functions w= -4x2 - 3y2, x= cos I, and y =sin t, express :7 as a function of 1, both by using the chain rule and by expressing w in terms of t and differentiating directly with respect to t. Then evaluate E at t = E. dw Express 3 as a function of t. dw dt