There are two points on the coordinate plane: A (2; 6) and B (4; -2). a) Write the equation of the perpendicular to the section AB. b) Write down the equation of the circle centered on A through B. Given y equals is a 3 x straight line and $${x}^{2}+8x+{y}^{2}-4y=48$$ a circle. c) Give the coordinates of the line and the circle with their coordinates.