The equation R(v)=(6000)/v can be used to determine the heart rate, R, of a person whose heart pumps 6000 milliliters (mL) of blood per minute and v milliliters of blood per beat. Complete the following:
a. R(6000)=1
b. R'(v)=-(6000)/v²
c. R'(6000)=-(1)/6
d. R''(v)=(12000)/v³