Answer
The statements reordered and restated in if-then form (each statement is prefaced by $\forall x$ which is not rewritten to simplify):
2. If x is an example, then x is not arranged in regular order like the ones I'm used to.
4. If x is not arranged in regular order like the ones I'm used to, then I can't understand x.
1. In contrapositive form: If I can't understand x, then I grumble.
5. If I grumble at x, then x gives me a headache.
3. In contrapositive form: If x gives me a headache, then x is not easy.
$\therefore$ these examples are not easy.
Work Step by Step
Universal transitivity:
$\forall x, P(x) \rightarrow Q(x)$.
$\forall x, Q(x) \rightarrow R(x)$.
$\forall x, P(x) \rightarrow R(x)$.
