Equation of the best quadratic approximation?

I'm not sure what to do for this. Here's the problem:

"(a) Find the equation of the best quadratic approximation to $\displaystyle y=ln(x)$ at x=1. The best quadratic approximation has the same first and second derivatives as $\displaystyle y=ln(x)$ at x=1.

(b) Use a computer or calculator to graph the approximation and $\displaystyle y=ln(x)$ on the same set of axes. What do you notice?

(c) Use your quadratic approximation to calculate approximate values for ln(1.1) and ln(2)"

Parts b and c, I don't doubt that they'd be easy after getting part a.

So could someone help me with part a?