Among the students being advised by Advisor 5, how many students are in the 5th year?
Advisor 5 refers to p_id_dummy = 5; are in the 5th year refers to yearsInProgram = 'Year_5'
SELECT COUNT(*) FROM advisedBy AS T1 INNER JOIN person AS T2 ON T1.p_id = T2.p_id WHERE T1.p_id_dummy = 5 AND T2.student = 1 AND T2.yearsInProgram = 'Year_5'