Complete the crossword puzzle

123456
Across
  1. 2. This operating system is used for mobile devices by google.
  2. 4. CEO of Alphabet incorporation.
  3. 6. Inventor of Modern day number system.
Down
  1. 1. It is free online word processing program similar to MS Word.
  2. 3. This is the another name of Base.
  3. 5. This area contains the actual chart and its other component.