Write SQL queries for the following sentences considering the given relational schema of university database. section course id sec id semester year building Toom_no time_slot_id classroom building room no capacity (i) takes ID course id sec_id semester year grade time_slot time_slot_id day start time end_time teaches ID course id sec id semester year course course id title dept_name credits prereq course_id prereq id student ID name dept_name tot cred department dept name building budget instructor ID name dept_name salary advisor s_id Suppose full name of the instructors are stored as atomic value where parts of names are separated by blank space. Find all instructors who has last name "Rob".