Final answer:
To calculate the student's total tax liability, determine the taxable income and use the tax table to find the tax owed based on the filing status of Head of Household.
Step-by-step explanation:
The student's total tax liability can be determined by using the tax table provided. Based on the provided information, the student's filing status is Head of Household. First, the student needs to find their taxable income. Assuming it is $20,000, the tax can be determined from the tax table. The tax owed would be $837.50 plus 15% of the difference between the taxable income and the threshold for the tax bracket, which is $8,375. This results in a total tax liability of $2,581.25.