A line L intersects the lines 3x - 2y - 1 = 0 and x + 2y + 1 = 0 at the points A and B respectively. If the point (1, 2) bisects the line segment AB, and the equation of line L is given by xa + yb = 1, then the value of a + 2b + 1 is:

Find the equation of a straight line passing through the points (1, 3) and (-2, 4).

Find the equation of the straight line upon which the length of the perpendicular from the origin is 4√2 units and this perpendicular makes an angle of 75° with the positive direction of the x-axis.