Locate and identify the absolute extreme values of the following functions. (a) ln left parenthesis sine 3 x right parenthesis on left bracket startfraction pi over 12 endfraction comma startfraction 5 pi over 18 endfraction right bracket (b) sine left parenthesis ln 3 x right parenthesis on left bracket one third comma startfraction 10 over 3 endfraction right bracket (a) the function ln left parenthesis sine 3 x right parenthesis has an absolute maximum value ? at x equals ? . (type exact answers.)