Can you help me with question 3 ( Q.3)

X-+0+ Problem 2: Locate the critical points of the given function then use the second derivative test to determine whether they correspond to local minima, local maxin neither. f ( x ) = 2x In ( x ) - 21x 2 Problem 3. Use a linear approximation to estimate the given quantity. Choose a value of a that produces a small error. Round to five decimal places as neede sin (330) - 18x + 9