1-2x yfor x 1,y 4. Evaluate the matrix function f(x, y) 0 COs y Using the subs command. b. a. By conversion into a MATLAB function. 5. Consider gt) tsin(t)+In(t-1). Evaluate dg/dt at t a. Using the subs command b. By conversion into a MATLAB function. 6. Consider hx)3sinx+3e1-2z. Evaluate dh/dx at x -0.3 a. Using the subs command b. By conversion into a MATLAB function. 1/3 7. Evaluate [x'+e) when a 1, x3 using an anonymous function in -a(x+1 another anonymous function