29. LO.3 Monica travels from her office in Boston to Lisbon, Portugal, on business. Her Cri absence of 13 days was spent as follows: De Thursday Friday Saturday and Sunday Monday through Friday Saturday and Sunday Monday Tuesday Depart for and arrive at Lisbon Business transacted Vacationing Business transacted Vacationing Business transacted Depart Lisbon and return to office in Boston a. b. For tax purposes, how many days has Monica spent on business? What difference does it make? Could Monica have spent more time than she did vacationing on the trip with- out loss of existing tax benefits? Explain. c