from typing import Tuple


def bbox(polygon) -> Tuple[float, float, float, float]:
    """Compute the Bounding Box of a polygon.

    :param polygon: List of coordinate pairs (x,y)
    """
    x,y = 0,1
    vtx = polygon[0]
    minx, miny, maxx, maxy = vtx[x], vtx[y], vtx[x], vtx[y]
    for vtx in polygon[1:]:
        if vtx[x] < minx:
            minx = vtx[x]
        elif vtx[y] < miny:
            miny = vtx[y]
        elif vtx[x] > maxx:
            maxx = vtx[x]
        elif vtx[y] > maxy:
            maxy = vtx[y]
    return minx, miny, maxx, maxy