What is the test for interpreting a statute?

A court's fundamental task in interpreting a statute is " ' " 'to ascertain the intent of the lawmakers so as to effectuate the purpose of the statute. [Citation.] We begin by examining the statutory language, giving the words their usual and ordinary meaning. [Citation.] If there is no ambiguity, then we presume the lawmakers meant what they said, and the plain meaning of the language governs. [Citations.]' " ' " (Burnham v. Public Employees' Retirement System (2012) 208 Cal.App.4th 1576, 1582-1583.)