4. Sam Wen, an Internal Revenue Service (IRS) auditor, took 35 minutes to process his first tax return. The IRS uses an 85% learning rate. How long should it take Sarn to process a. the 14 tax return? b. the 19tax return? c. the 35% tax return? d. the first 14 tax returns? e. the first 19 tax returns? f. the first 35 tax returns? g. the tax retuns 15 through 19-? h. the tax returns 20 through 35