I am not a native English speaker, I am not sure whether the following sentences are correct, I am confused how the simple past and present perfect can be used in one sentence. What is the general rule for them?
The sentences are used to describe how things have been done.
A typical vehicle model was chosen as the virtual vehicle, it has 195/65 R15 tires and the mass of the vehicle is 1301kg.
The road was designed with slalom, which has been created with Pylon Alley.
Thank you for your help!