[填空题]
A person going for a morn /p v11zl:q:u pbut,jging jog on the deck of a cruise ship is running00 nogg)/cae*+cphrvl3 ; 9po2iltrg toward the bow (f /rnl trl9cc0vo2o3;0eg p g)i*h+apgront) of the ship at 2.2 $\mathrm{~m} / \mathrm{s}$ while the ship is moving ahead at 7.5 $\mathrm{~m} / \mathrm{s}$ . What is the velocity of the jogger relative to the water? m/s
Later, the jogger is moving toward the stern (rear) of the ship. What is the jogger's velocity relative to the water now? m/s