Current Affairs 29th September

Mathc the following Columns. {:("Column I","Column II"),("A. World Environment Day","1. 2nd December"),("B. World Ozone Day","2. 29th December"),("C. National Pollution Prevention Day","3. 16th September"),("D. Biological Diversity Day","4. 5th June"):}

If Friday falls on 15th of September 2000, what will be the day of 15th of September 2001?

If Friday falls on 15 th of September 2000, what will be the day on 15 th of September 2001?

If the 9th term of an AP is zero, then prove that its 29th term is twice its 19th term.

If 9th term of an A.P.is zero,prove that its 29th term is double the 19th term.