Ten students took an online quiz consisting of 12 questions. For each correct answer a student earns two points, and for each incorrect answer the student loses one point. Consider the following two claims: Claim 1: Mean score of the students on the quiz can be negative. Claim 2: Mean score of the students on the quiz can be zero. Which claim is correct? only claim 1 only claim 2 both, claim 1 and claim 2 neither claim 1 nor claim 2