SOLIDWORKS Design & Help

Created by Angel Ramirez on 9 March, 2018

can anyone help me with this sketch..?

I am lost in that arc portion arc R1000 & R3500.


Which arc i should draw first? and which type of arc should i use to sketch? CenterPoint (don't know center point) OR Tangent (Here two arcs are connected so what should i select as tangent?)