On opencourses.gr, find all postgraduate courses related to 'Computer Science, Informatics, Telecommunications' offered by the 'National and Kapodistrian University of Athens'. List the titles of these courses and the total count.
Navigate to the homepage of opencourses.gr. Locate and click on the 'subjects' link. Find and click on the 'Επιστήμες Υπολογιστών, Πληροφορικής, Τηλεπικοινωνιών' (Computer Science, Informatics, Telecommunications) subject. Apply the 'Μεταπτυχιακό' (Postgraduate) filter under 'Course Level'. Apply the 'Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών' (National and Kapodistrian University of Athens) filter under 'Academic Institution'. Extract and list the titles of all displayed courses. Count and state the total number of courses found.
Successfully navigate to the 'Computer Science, Informatics, Telecommunications' subject page. Correctly apply the 'Postgraduate' course level filter. Correctly apply the 'National and Kapodistrian University of Athens' institution filter. List the exact titles of all courses displayed after applying both filters. State the total number of courses found that meet all specified criteria.