How to? Drag to Rotate Object and Click To Load Static Mesh

Hi Guys,
I am looking for two kind of blueprints or here is what i want to achieve in UE4,

1: I have Static Mesh in my Scene, so when i play the game as mouse course is enabled, i want to click drag to rotate the object into 360 degrees?

2: I have simple menu in my scene, so i want to enable that, when i click on Button A: it loads the A static mesh and one same place i Click on Button B, in place of A Static mesh, it loads the B Static mesh?

Is it possible? i am stuck with that i need your help guys…

any one please?