(a) (4 points) Convert the NFA below to a regular expression a, b a 90 (b) (4 points) Give an NFA that accepts the language described by the regular expression ((a o b) u (bo a))" (a) (4 points) Convert the NFA below to a regular expression a, b a 90 (b) (4 points) Give an NFA that accepts the language described by the regular expression ((a o b) u (bo a))