mike webb married to nancy webb is employed

For 2014, Mike and NancyAGI was $175,000 and their actual federal income tax liability was $29,000.
a. Compute the Webbs regular federal income tax liability for 2015, including self-employment taxes.
b. Are the Webbs subject to AMT in 2015?
c. Are the Webbs due a refund for 2015?
d. Are the Webbs subject to any underpayment penalties for 2015?