1 'abc'.lastIndexOf('a', 4) = 0 2 'abc'.lastIndexOf('b', Infinity) = 1 3 'abc'.lastIndexOf('a', -1) = 0 4 'abc'.lastIndexOf('a', -Infinity) = 0 5 'oracle'.lastIndexOf('u') = -1 6 'hello'.lastIndexOf('l') = 3 7 'hello'.lastIndexOf('l', 2) = 2 8 'hello'.lastIndexOf('l', 3) = 3 9 'hello'.lastIndexOf('l', 1) = -1