Tap To Shoot 2D

I came up with an android game, and i used the 2D SideScroller Setup. I also used the google android character and i want him to raise his hand and shoot a green ball from it when you tap on the screen and when he shoot the ball that his arm would go backward and slowly get back to the same position as it was. Now i know that i have to make an animation for that to be done but i don’t know how to set it up when i finish the animation of the google android shooting a ball out of his hand… help would be really appreciated

Using Animation Events