A music school wants to expand its class schedule. To better understand the current schedule, the director looked at which instruments are taught or not taught on various days of the week. The Venn diagram shows this information for two days of the week. -All instruments taught- Taught on Monday Violin Djembe Zither Bass Taught on Thursday Koto Cello Piano Guitar Oboe Lute (a) How many instruments are not taught on Monday? instruments (b) How many instruments are taught on Monday or Thursday (or both)? instruments (c) Which instruments are taught on neither Monday nor Thursday? Choose all that apply. Bass Lute Cello Oboe Djembe Guitar Piano O Violin X Koto Zither Ś​