B1/B2 visa to my parents while I am studying Ph.D and doing my CPT

USA B1/ B2 Visitor Visa
1

Hello there,

I am pursing my Ph.D in USA and I am doing CPT. I have applied B1/B2 visa for my parents, I have few questions.

  1. Can I sponsor for my parents while I am studying?
  2. My university cannot provide invitation letter because according to U.S department of state doesn’t require such a letter for visiting visa.
  3. Can I send soft copy of the invitation letter.

Thanks & Regards
Uday