4. Scalar equations. Using the variables created in 1, calculate x, y, and z. a. x= 1 1+e(156) b. y=(a+b), recall that h=h", and use sqrt C. z= log(R[(c+d)(c-d)]sin (ax/3)) ce where R indicates the real part of the complex number in brackets, is the complex conjugate of c, and log is the natural log (use real, conj, log).