question: whether in the historic city centre, in the traditional wine taverns or on the other side of the danube: vienna is full of architectural highlights.
Capitalize this past sentence correctly.
A: Whether in the historic city centre, in the traditional wine taverns or on the other side of the Danube: Vienna is full of architectural highlights.

question: ep7mdl0o.dll device can't work/no sound: actually, in most cases device problem is because of .sys files.
Capitalize this past sentence correctly.
A: EP7MDL0O.DLL device can't work/No sound: Actually, in most cases device problem is because of .sys files.

question: this health issue is called hypermagnesemia.
Capitalize this past sentence correctly.

A: This health issue is called hypermagnesemia.