1- One of the weaknesses of the various cost estimation methods is a simplifying assumption that cost behavior patterns are

a. semi-fixed within the relevant range

. b. linear within the relevant range. c. semi-variable within the relevant range.

d. curvilinear within the relevant range.

Which of the following are the two costs of controlling quality?

	a.	prevention costs and appraisal costs.
	b.	internal failure and external failure costs.
	c.	appraisal costs and internal failure.
	d.	prevention costs and external failure costs.