How do you defeat Thomas magruder on the game gun

To Defeat Magruder There Are 2 stages , Dont even bother shooting him and wasting your quick draw . simply when Magruder steps on the holes in the ground shoot them with a dynamite arrow or set them with doused dynamite , then shoot when he walks over them.
The second stage is much easier , he is on a ledge , when he throws dynamite quick draw them and shoot them , after a little while one column will fall down , then the other will follow . then the roof falls in BOOM story complete.

The Simplified Version , LloydiiBoii =D