The points $$\(A, B\)$$ and $$\(C\)$$, shown on the grid, are the vertices of triangle $$\(A B C\)$$. (a) Write down the coordinates of the point $$\(B\)$$. (1) (b) Write down the mathematical name of triangle $$\(A B C\)$$. (1) The coordinates of point $$\(D\)$$ are $$\((1,-4)\)$$ (c) On the grid, mark with a cross $$\((\times)\)$$ the position of $$\(D\)$$. Label the point $$\(D\)$$. (1) (d) Find the coordinates of the midpoint of $$\(A B\)$$. (2)

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