A river of width \( 200 \, \text{m} \) is flowing from west to east with a speed of \( 18 \, \text{km/h} \). A boat, moving with speed of \( 36 \, \text{km/h} \) in still water, is made to travel one-round trip (bank to bank of the river). Minimum time taken by the boat for this journey and also the displacement along the river bank are ________ and ________ respectively.