What are the first names and office of the professors who are in the history department and have a Ph.D?
select t1.emp_fname, t2.prof_office from employee as t1 join professor as t2 on t1.emp_num = t2.emp_num join department as t3 on t3.dept_code = t2.dept_code where t3.dept_name = 'History' and t2.prof_high_degree = 'Ph.d.'