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Use the following information to answer questions 4-6: Internal Revenue Services (IRS) selects taxpayer files for audit if their profile matches certain criteria. The Following sample is taken from taxpayers who were audited for tax year 2018: Frequency Taxable Income($1000s) 1 20 to under 40 5 40 to under 60 16 60 to under 80 21 80 to under 100 23 100 to under 120 17 9 120 to under 140 140 to under 160 160 to under 180 4) What is the cumulative relative frequency of taxpayers who were audited and their taxable income was less than $100,000? A. 0.17 B. 0.21 C. 0.43 D. 0.54 5) What was the approximate average taxable income of taxpayers in this sample? A. $62,000 B. $89,500 C. $96,600 D. $107,400 6) What is the approximate standard deviation of taxable income in this sample, rounded to nearest dollar A. 27,819 B. 28,350 C. 32,821 D. 32,987