Are these statements true (T) or false (F), according to the text? ( ) The tablet revolution has developed several products for the visually impaired. ( ) Button-less touchscreens have traditionally been designed to help those who are blind. ( ) A group of visually impaired people has been developing special kinds of tablets. ( ) A Stanford team has created a touchscreen-based Braille reader. ( ) Adam Duran created a touchscreen-based Braille writer with the help of two professors. Mark the alternative which presents the correct sequence, from top to bottom.