Find the equation of a line with each of the following characteristics. a) parallel to the line y = 3x + 5 and has a y-intercept of -1 b) perpendicular to the line y = 5x - 1 and passes through the point (10, 8) c) perpendicular to the line y = 1⁄3x + 4 and has an x-intercept of 2.