Please help me with the b for the number 13 and also the number 5 if you can. I already posted number 5 in another post but no answers yet. Thank you in advance.

ACCOUNTING CHAPTER HOMEWORK instructions help Question 13 of 13) Save & Ext submit 13. 1000 points This year, Santhosh, a single taxpayer, estimates that his tax lablty wil be s100,000. Last year his total tax blank. was He estimates that his tax withholding from his employer be S5.000 (Leave no answer Enter zero if applicable) a. ls Santhosh required to increase his withholding or make estimated tax payments this year to avoid the underpayment penalty? O No O Yes b. By how much, if any, must Santhosh increase his withholding and/orestimated tax payments the year to avoid underpayment penalties? References eBook & Resources