Unity NavMesh to Improve Vehicle Navigation on Ramps up and down RAMPS

HI !!!... I almost have my game finished in Unity 2022.3 using NAVMESH, and I have 5 NAVMESH AGENT cars, but they can't go up or down ramps. I need someone to make my cars do this. I'll provide some photos and a couple of videos of how they do it, and I need to improve it. In other words, the NAVMESH AGENT cars go up and down, but they do it incorrectly, and I need to fix this. I will provide the complete scene, so please watch the following videos before making an offer.