How to build a kicker ramp for BMX or MTB

Today, well be building a multipurpose ramp which can be used for a BMX or mountain bike. My friend James is helping out with his truck and workspace Our ramp will be made from just one piece of 1, 2 plywood and some 2x4s. Including the screws, the materials are only about 50. Im spending slightly more for pressure treated wood and stainless deck screws, just to make the ramp more resistant to the outdoors. With normal wood itll be just as sturdy. First well draw the profile of the ramp on the plywo