based on the 2020 tax brackets

its an accounting/finace problem, thanks for the help! ALL information needed to answer is in the question.

Cole and Ellen were married, when Ellen passed away in March of 2020. Cole pays 100% of the cost to maintain their home. They had no children, but were taking care of Cole's aging father (Blake), who lives in a nursing home Blake is a dependent of Cole. When Cole files the 2020 tax form, what tax status should be file? Khoa and Emily were married for 10 years. Emily passed away in a tragic accident in February 2019. They have two qualifying children ages 4 and 6. Khoa provides 100% of the cost to maintain the household and 100% of the support for the children. Khoa has not remarried through 2022. What is the amount of the standard deduction for Khoa on his 2020 tax return