In performing a test of controls for sales order approvals, the CPAs stipulate a tolerable deviation rate of $8$ percent with a risk of assessing control risk too low of $5$ percent. They anticipate a deviation rate of $2$ percent. Use Figure $9-4$ and Figure $9-5$Required:a$.$ What type of sampling plan should the auditors use for this test?b$.$ Using the appropriate table or formula from this chapter, compute the required sample size for the test.c$.$ Assume that the sample indicates four deviations. May the CPAs conclude with a $5$ percent risk of assessing control risk too low that the population deviation rate does not exceed the tolerable rate of $8$ percent?