Q2) (50 points) Consider the following database about patients visiting doctors. A record is added into the table visits whenever a patient visits a doctor. Primary keys are underlined Patients (Pnum Pname, Age, Address, Phone) Doctors (Dmum, Dname. Rank, Salary) Visits (Pnum Dpum, Visit_Date, Diagnoses) Write an SQL statement for the following queri 1. List the doctors with rank starting with the letter 'P 2. List the patients' names and ages from the oldest to the youngest 3 List the patients who visited Dr. Ahmed and remove duplicates 4. Delete all patients with age between 12 and 20 years. 5. Increase the salary of all doctors with rank 'P3, with 10%. 6. Write the create table statement of the table visits, specify the primary key, foreign keys and any constraint