Set up your table saw fence to 2-1/4 inches from the right side of your table saw blade, and raise the blade to about 1-inch above the table. Be sure that the blade is set to 0-degrees (square to the surface of the table top). Rip the 16-inch and 13-inch boards into two 2-1/4 inch widths each. Set the leftover strips aside.
Then, adjust the width of the fence to 4-inches, and rip the two pieces of for the bottom of the feeder.