i mean what is the step for it
kindly explain it step by step i catia or in solidworks
Best thing to do is have a look of the vast amounts of tutorials....
Or buy a book about the use of solidworks...
or this one: 3D Engineering and Designing for Dummies
No insult intended, but if you wanna be a designer you have to know how to design....takes years for automotive designers to learn the trade, so you can understand it is not a matter of..."explain step by step"