Last Wednesday, a School successfully accomplished its school's day. For this music. In a class of 45 students, 21 participated in athletics and 29 participated in program, every student participated in at least one of the activities, athletics or music. (i) How many students participated in either athletics or music? (ii) How many students participated in both the activities? (iii) How many students participated only one activity? (iv) Draw a Venn-diagram to represent the above information. ​