We measure Stokes parameter 1 using a linear polarizer oriented first at +45 deg to the y (vertical) axis and then at -45 deg, measuring the transmitted intensities J45 and J-45. Thus the degree of linear polarization along the direction at +45 deg to the y axis is 1 = (J45 - J-45)/J. Show from (50.13,1,3) that 1 = 2Re( yz) = [t + EzEy*>t]/J. Using the latter expression, find 1 for (a) linear polarization along +45 deg; (b) linear polarization along -45 deg; (c) linear polarization along 0 deg; (d) Circular polarization (R or L)?