Part A. Find the gradient of AB,
The point D has coordinates (3,7)
Part B.(i) Find an equation of the line DC
Part B.(ii) The anle BAD is a right angle. Find an equation of the line AD, giving your answer in the form mx+ny+p=0, where m,n and p are integers
Part C. The line BC has equation 5y-x=6. Find the coordinates of B.