Dr. Walter JohnsonDr. Johnson, age 52, was divorced in 2008.Children: Charles Johnson, age 14, is in the custody of Dr. Johnson’s ex- wife.Dr. Johnson is employed as a staff doctor at St. George Hospital; he is an active participant in the hospital pension plan.Dr. Johnson assembled the following information for calculation of his tax liability.IncomeSalary: $250,000Interest income from taxable money market fund: $2,600Qualified dividend income: $6,500Municipal bond interest income: $14,000Short-term capital gain income: $4,000ExpensesIRA contribution: $6,500Alimony payment: $24,000State and local income taxes: $10,500Real estate taxes: $4,800Sales tax on motor vehicle purchase: $2,500General sales tax: $400Home mortgage interest: $17,600Credit card and automobile loan interest: $10,400Unreimbursed employee business expenses: $1,7901. What is Dr. Johnson’s adjusted gross income?2. What is Dr. Johnson’s taxable income?3. What is Dr. Johnson’s total tax due?4. Describe the fundamental methods that Dr. Johnson has used to manage his tax liability effectively.