I need help with these 2 problems please and please make it legible.

Find the velocity and acceleration vectors in terms of u, and up. r= a(3 + cos t) and 0 = 1 - e , where a is a constant . . . . . v = (Du, + Due a = (Du, + (DueGiven the function f(x,y) = 4, answer the following questions. I25 4x y2 at Find the function's domain. b. Find the function's range. 0. Describe the function's level curves. d. Find the boundary of the function's domain. e. Determine if the domain is an open region, a closed region, both, or neither. f. Decide if the domain is bounded or unbounded. 3. Choose the correct domain. 0 A. The set of all points in the xy-plane that satisfy x2 + y2 2. QB. Circles with radii