(a)u'(1)=It does exist.u'(1) does not exist because f'(5) does not exist.u'(1) does not exist because g'(1) does not exist.u'(1) does not exist because f'(6) does not exist.u'(1) does not exist because g'(5) does not exist.(b)v'(1)=It does exist.v'(1) does not exist because f'(1) does not exist.v'(1) does not exist because g'(1) does not exist.v'(1) does not exist because f'(2) does not exist.v'(1) does not exist because g'(2) does not exist.(c)w'(1)=It does exist.w'(1) does not exist because f'(1) does not exist.w'(1) does not exist because g'(1) does not exist.w'(1) does not exist because f'(5) does not exist.w'(1) does not exist because g'(5) does not exist.