1. Can one make Duaa while walking or sitting (that is alone, during working hours or idel time. 2. Standing and making Duaa, I notice people in the Haramains stand before Fard Salaat and lift there hands up. 3. Do you have to raise your hands when making Duaa – using Q1 as an example.
Assalaamu Alaykum Wa Rahmatullaahi Wa Barakaatuhu
The different procedures of making Du’aa explained in the details of your question are permissible.
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai