Identify FOUR features of Anton Webern's Op.22 Quartet Mvt.I that are typical of the early 20th Century style.

Any 4 from-serial-dodecaphonic/12-tone-Klangfarbenmelodie-tone clusters-irregular meter-short movement-unconventional instrumentation-use of conventional form -experimental structure (ie. palindromic)-specific performance instructions on the score-or any other relevant response