Number 59 from Section 3.2. The temperature in a refining tower is f(x)=x4-4x3112 degrees Fahrenheit after x hours (for 0x5).(a) Make sign diagrams for the first and second derivative.(b) Sketch the graph of the temperature function, showing all relative extreme points and inflection points.(c) Give an interpretation of the positive inflection point.Number 66 from Section 3.2. Sales of dynamic random access memory (DRAM) chips are approximated by the function S(x)=13x3-3x25x32, in billions of dollars, where x stands for the number of years since 2004.(a) Make sign diagrams for the first and second derivative.(b) Sketch the graph of S(x), showing all relative extreme points and inflection points.(c) Interpret the meaning of the inflection point and determine the year in which it occurred.