Help me name this molecule!?!?!?

Its name is 4-methylhexanoic acid.

The principal function group is carboxyl group (–COOH) and thus its suffix is "-oic acid".
The longest chain including the carboxyl group consists of 6 carbon atoms, and thus the longest chain is hexanoic acid.
There is a methyl group (–CH₃) at C-4 position where the carbon atom in –COOH group is labeled as C-1. Therefore, a prefix 4-methyl- is added.

Call him Barry