If $P(A)=0.5,$ $P(B)=0.6$ and $P(A \textrm{ and } B)= 0.15,$ find the following probabilities:
a)   $P(A \textrm{ or } B) =$
b)   $P( \textrm{not }A ) =$
c)   $P( \textrm{not }B ) =$
d)   $P( A \textrm{ and } (\textrm{not }B) ) =$
e)   $P( \textrm{not }(A \textrm{ and } B)) =$