Write a Python function named "projectile$\_$motion$($v$0,$ angle$)"$ that simulates the trajectory of a projectile launched with an initial velocity v$0($in meters per second$)$ at an angle $($in degrees$)$ from the horizontal. The function should calculate and return the maximum height reached and the range of the projectile. Use the function to simulate a projectile launched with $v0=50\frac{m}{s}$ at angles of $30,45,$ and $60,$ and plot the trajectories on the same graph.