Suppose we have data on 25 projects and 15 managers (10 of whom are project managers and assign manage a project). Answer the following questions in the context of the ER diagram and relations that ap in Figure 2. How many rows appear in the MANAGER relation? How many rows appear in the RUNS relation? What is the primary key of the RUNS relation? Justify your choice. Cranber PLANT Bulg BA Con 16.11 PLANT (PL name, Pl_p#, Pl_budget) PROJECT (Prj_name, Prj_location, Prj_p#, Prj_pl_p#) MANAGER (Mgr_emp_no, Mgr_type_mgr) RUNS (Run_prj_p#, Run_mgr_emp_no) Figure 2 PROJECT 10,1) Funs 10.11 MANAGER Type mo