Science:Math Exam Resources/Courses/MATH101/April 2012/Question 07 (c)/Hint 1

As it says in the question statement, given $n$, an even integer, and an upper bound $K\ge |f^{(4)}(x)|$ for all $x$ in the interval $[a,b]$, the error that comes from using Simpson's Rule is as follows:

$|I-S_n|\le \frac{K(b-a{)}^5}{180\cdot n^4}$

How would you find K?