Three different liquids are mixed together in a calorimeter. the masses of the liquids are m1 = 520 g, m2 = 715 g, m3 = 370 g. the specific heats are: c1 = 280 j/kg°c, c2 = 535 j/kg°c, c3 = 805 j/kg°c. the initial temperatures of the liquids are: t1 = 24.5 °c, t2 = 59.0 °c, t3 = 84.5 °c. what will be the temperature of the mixture in celsius? (enter only a number without a unit.)