To solve the problem, we need the coordinates of the two points A and B where the hikers are located. Let's denote the coordinates of hiker A as \((x_1, y_1)\) and the coordinates of hiker B as \((x_2, y_2)\).
(a) Distance between the hikers:
The distance \(d\) between two points \((x_1, y_1)\) and \((x_2, y_2)\) in a 2D Cartesian coordinate system can be calculated using the distance formula:
\[ d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} \]
(b) Midpoint between the hikers:
The midpoint \(M\) between two points \((x_1, y_1)\) and \((x_2, y_2)\) can be calculated using the midpoint formula:
\[ M = \left( \frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2} \right) \]
To provide specific answers, please provide the coordinates of points A and B.