1- Write a MATLAB function that takes coordinates of four points as inputs and returns the coordinates of intersection of the line passing through points 1 and 2 and the line passing through points 3 and 4. For function name and input arguments, use: P line_int(P1, P2, P3, P4) The function should be able to handle row or column vector entries. This function will use a sub-function called line_ eq. This sub-function takes coordinates of two points as inputs and returns m and b such that y mz +b represents the equation of the line passing through these points. For sub-function name and input arguments, use: [m, b] -line_eq(PA, PB)