1-2x x+y 4. Evaluate the matrix function f(x, y) =| for x = 1,y=-1 0 cosy a. Using the subs command. b. By conversion into a MATLAB function. 5. Consider g(t) = t sin(t)+ In(t-1). Evaluate dg/dt at t = a. Using the subs command. b. By conversion into a MATLAB function. 6. Consider h(x) = 3*-2 sin x+e-2*. Evaluate dh/dx at x = -0.3 a. Using the subs command. b. By conversion into a MATLAB function. 7. Evaluate [x +(x+1)] 1/3 when a = -1, x = 3 using an anonymous function in +e another anonymous function.