4. Between O oc and 30 oc. the volume V in (in crn') of I kg Of water at a temperature T is gLsen approximately by the formula V = 999.87 -0.06426T 0.0085043T' -0.0000679T' . Find the temperat>1V at which water has its maximum dcesity. (Remember, the smaller volume then r the dczsity).