V. Let C be the curve in the two-dimensional space that is parametrized by the vector-valued function Q(t) = (In(2+2), 21+ 3). 1. Find Q'(t). 2. Find the concavity of C at the point where t = 2. 3. Find a set of parametric equations for the tangent line to C at the point where t = 2. 4. Let be a vector-valued function such that X(2) = (-1,6) and X'(2) = (4,3). Evaluate the expression ((t) x(t)) at t=2. dt