JEE Main Physics question

A goa [sic: boat] can travel at a speed of 8 kmh in still water on a lake. In the flowing water of a stream, it can move at 8 kmh relative to the water in the stream. If the stream speed is 3 kmh, how fast can the boat move past a tree on the shore in travelling (i) upstream (ii) downstream?

• (A)5 kmh and 11 kmhCorrect
• (B)11 kmh and 5 kmh
• (C)8 kmh and 8 kmh
• (D)5 kmh and 5 kmh