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Show the regions that satisfy each of the following inequalities.
(a)# -2le1/2 xlt7#
(b) #-le3x-1lt5#
(c) #1/3-1/5 xlt1/2 x+1#
(d) #-2lexlt7#
(e) #1/2 x+ 1/2gt1/4#
(f) #1/7 x- 1/3lt1/5+ x/3#