Nadia died in 2015 and is survived by her husband, Jerold (age 44); her married son, Travis (age 22); and her daughter-in-law, Macy (age 18). Jerold is the executor of his wife's estate. He maintains the household where he, Travis, and Macy live, and Jerold furnished all of their support. During 2015 and 2016, Travis is a full-time student, while Macy earns $7,000 each year from a part time job. Travis and Macy do not file jointly during either year. What is Jerold's Federal income tax filing status for 2015 and 2016 if all parties reside in:
a. Idaho (a community property state)?
b. Kansas (a common law state)?