Please explain each of these in detail

4. Use the formula m = X2-X1 12 1 to find the gradient between these pairs of points a b. (1, 7) (2, 3) ( 1, 1) ( 2 , 3 ) (1, 1) - X (7, 1) . d. e. F . ( 1, 7) (2, 3) (-3, 1 ) (7, 1) X X 12 , - 1) (- 3, - 5. Find the gradient between the following pairs of points: a. (1, 3) and (5, 7) b. (-1, -1) and (3, 3) c. (-3, 4) and (2, 1) d. (-6, -1) and (3, -1) e. (1, -4) and (2, 7) f. (-4, -2) and (-1, -1) 6. The first section of the Cairns Skyrail travels from Caravonica terminal at 5 m above sea level to Red Peak terminal, which is 545 metres above sea level. This is across a horizontal distance of approximately 1.57 km. what is the overall gradient of this section of the Skyrail? Round the answer to three decimal places