1. In MAPEH competition, 90 medals are awarded in different categories: medals in sports, medals in arts, medals in music and medals in music and medals in music, art, and sports.
33 got medals in arts
46 got medals jn sports
55 got medals in music
44 got medals in art, music and sports
12 got medals in music and arts
18 got medals in sports and music
17 got medals in arts and sports
How many got medals in music only? How many got medals in arts only? How many got medals in sports only?

2. In a survey of Senior High School students, 64 has like academic track, 45 had like sports track, 78 had like TVL, 30 had like academic and sports, 26 had like academic track and TVL, 23 had like sports and TVL and 12 had like all the three tracks. Find how many had like one course only.

3. The school discovered that 1 12 of its 190 students watch television, 1 13 listens to the radio, and 150 use mobile phones. In addition, 75 people use television and mobile phone, 95 people use television and radio, 85 people use radio and mobile phones, and 70 people use all three. How many people solely used their phones? How many people ultilized television and radio instead of mobile phones?​