Question 1171152
z=(x-mean)/sd
a. is simply 0.50
b.is between 0 and +1 sd or 0.3413 probability.
c.is less than z=1 or 0.8413 probability 
d.This is z <13/7 or 2ndVARS2normal cdf(-6,13/7)=0.9864 probability. I use -6 but any numbers smaller is fine for the first argument.
e.That is z>-1 sd, which is the same as z < +1 sd or 0.8413 probability.  Use symmetry when you can.