A national soccer coach invited 20 players for a match. 8 of them were attackers. 12 of them were defenders and 12 were mildfielders. The coach realized that 5 could play both in the attack and in the midfield, 6 defence and midfield, 2 only in attack and 3 play all three roles. a) Illustrate the information in a Venn diagram b) Find the number of players that can play 1) only midfield i) exactly two roles