Q3. a) On a map’s coordinate grid, Walt City is located at (−1, −3) and Koshville is located at (4, 9). Find the coordinates of the town which is exactly in the middle of the line joining both the cities. [A3-4]

b) City hospital is equidistant from both the cities of Walt City and Koshville. Find the equation of the line joining City Hospital to the town referred to in part a. [A7-8, C3-4]