#$21$ Use the following query to answer the question below it: SELECT $[$Valid Patients$].$PAT NAME, $[$Valid Patients$].[$Age Class$],$ PATIENT.HOME PHONE FROM PATIENT INNER JOIN $($ SELECT V$\_$PAT$\_$FACT.PAT$\_$ID "Patient ID$",$ V$\_$PAT$\_$FACT.PAT$\_$NAME "Patient Name", Class" CASE WHEN V$\_$PAT$\_$FACT.AGE$\_$YEARS $>=18$ THEN 'Adult' ELSE 'Ped' END 'Age FROM V$\_$PAT FACT WHERE V$\_$PAT$\_$FACT.IS$\_$VALID$\_$PAT$\_$YN $="$ Y $\text{'})$ "Valid Patients" ON PATIENT.PAT$\_$ID $=[$Valid Patients$].$ "Patient. ID$"$ Why does this query fail to run?