Find the first names and degree of all professors who are teaching some class in Computer Info. Systems department.
SELECT DISTINCT T2.emp_fname ,  T3.prof_high_degree FROM CLASS AS T1 JOIN employee AS T2 ON T1.prof_num  =  T2.emp_num JOIN professor AS T3 ON T2.emp_num  =  T3.emp_num JOIN department AS T4 ON T4.dept_code  =  T3.dept_code WHERE T4.dept_name  =  'Computer Info. Systems'
first names refers to emp_fname; degree of all professors refers to prof_high_degree; teaching some class refers to a condition to join tables CLASS and employee; Computer Info. Systems department refers to dept_name = 'Computer Info. Systems';