Installing drains in an existing home requires your plumber to work with the structure that is already in place. Since flexibility is limited, the type and location of the drain plays an important part in pricing the installation. Installing basement drains costs an average of $279 across the country, compared to $401 for outdoor drains. The installation of a drain inside your finished home is a complex project that may affect several areas of your house, costing an average of $241.
Practice writing with your non-dominant hand for a month or more. Every day, write out the alphabet using your non-dominant hand in lowercase, uppercase and cursive (if you know how). At first your hand will be shaky and the letters won't be nearly as neat as with your other hand.
There seems to be people that are quite sure of themselves giving both answers. I have seen a few images of him with a chalk in his right hand. As a left hander though I also write on the board with my right hand as many left handers do (you have to for cursive or the chalk bounces).