49. If a taxpayer's AGI is greater than $150,000, no penalty will be imposed if the taxpayer pays estimated tax payments in 2018 equal to what percentage of 2017's income tax liability?

A) 90%

B)100%

C) 105%

D) 110%

50. Laquan and Sabrina Lewis had alternative minimum taxable income of $1,050,000 in 2018 and file a joint return. For purposes of computing the alternative minimum tax, their exemption is

A) $96,900.

B) $59,400.

C) $0.

D) $109,400.