I really need help on 6 and 7 with full answer and explanation I'm having a difficult time . Thank you for all that you do.

6. When a patient is prescribed an antibiotic to ght off infection, the dose, D, in milligrams is a function of the patient's weight, in pounds. Let D = f (w) dene the dosage. Interpret the meaning of each statement. A. f(135) = 120 B. f'(135) = 2.5 C. Estimate the dosage for a person weighing 140 pounds. 7. During a hurricane in Central Florida, the amount of rainfall, R, in centimeters, is a function of time. Let R = f (t) define the amount of rain recorded by meteorologists beginning at midnight. Give an interpretation of the statements below, using the appropriate units. A. NS) = 4.3 B. f'(6) = 0.5 c. f'1 (5) = 14 n. (f-1 )'(5) = 1.5