Correctly arrange the examination time
According to the driving test regulations, applicants for automobile driver's license can only make an appointment for the subject 2 test ten days after passing the subject 1, and can only make an appointment for the subject 3 test thirty days after passing the subject 1.
The students who received the certificate in 45 days arranged the examination time in this way: on March 6, they made an appointment for the subject 1 exam and passed the exam on March 14. Subject 2 is scheduled for March 28th and passed the exam on April 9th. Subject 3 made an appointment on April 28th19th, passed the exam on April 28th, and took the joint exam of the four major civilizations on the same day.