Redox reactions don’t understand how to do it

Na Redox

FeCl Oxidized

C2H2 and O2 both are Oxidized

Cu is reduced and HNO3 is Oxidized

AgNO3 is Oxidized and Cu is Reduced

BR and Cl2 both are oxidized

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

the answer is d. 74.02