(c). In a survey of 50 musicians, it was found that 20 people played the piano, 25 played the guitar. Additionally, it was noted that 7 played both instruments while 12 played neither. Draw a Venn diagram to represent this situation. Label each part of the Venn diagram clearly. Soln. (d). Premise: Some animals are cold-blooded Premise: My dog is an animal Conclusion: My dog is cold blooded. Use a Venn diagram to determine the validity of this argument. Soln