53. The quantity of oxygen that can dissolve in water depends on the temperature of the water. (So thermal pollution influences the oxygen content of water.) The graph shows how oxygen solubility S varies as a function of the water temperature T. (a) What is the meaning of the derivative S'(7')? What are its units? (b) Estimate the value of S'(16) and interpret it. S+ (mg/L) 16+ 12+ * + 16 24 32 40 TCC)