Question on Essentials training manual part......

Hello all,

Another quick question.  Following along with the Essentials training book, I'm stumbling on a certain lesson.  For the tool post attached, I cannot figure out how to place the spherical radius on the end (R45 spherical radius per attached PDF) and also the flattened surface at 32mm wide.  I know this is certainly a simple one for all of you experts on this forum lol.  The square cutout is easy as an extruded cut through all, but I need to get the flat surface first before I can place the cutout at the tangent point at the left end for positioning.  Much appreciated!  Thanks! 

SolidworksSketching