Describir: Seated work postures for manual, visual and combined tasks /

  _  __     ___      _  _     _____     _____    __   __   _____      _____   
 | |/ //   / _ \\   | \| ||  |  ___||  / ____||  \ \\/ // |  __ \\   |  ___|| 
 | ' //   / //\ \\  |  ' ||  | ||__   / //---`'   \ ` //  | |  \ ||  | ||__   
 | . \\  |  ___  || | .  ||  | ||__   \ \\___      | ||   | |__/ ||  | ||__   
 |_|\_\\ |_||  |_|| |_|\_||  |_____||  \_____||    |_||   |_____//   |_____|| 
 `-` --` `-`   `-`  `-` -`   `-----`    `----`     `-`'    -----`    `-----`