hi, can you please answer only 1,2 and 5 questions? and please follow the roles

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hi, can you please answer only 1,2 and 5 questions?
and please follow the roles

hi, can you please answer only 1,2 and 5 questions?
and please follow the roles of the assignment and don’t forget the reference
Eldenburg, L. G., & Wolcott, S. K. (2011). Cost management: Measuring, monitoring, and motivating performance (2nd ed.). Hoboken, NJ: John Wiley & Sons, Inc. ISBN-13: 978-0470-76942-3.