Write a MATLAB script m-file to assign the following expressions to a variable x1 and then display the value of x1 7 + 9 (12-3 8 12-128 16 b.2 C. d. (0.0000789 + 5.167103) 0.84567x 10-2 9 20 Points lf z is a function of x and y such that (x,y) = x1/3 + 5 xy-27 e-3 ,2 , write an equivalent Matlab expression for z. 10. 30 Points Consider the following Matlab assignment statements: >> a = 7.8: x = [8, 12,-30, 45]; Write Matlab expressions for