If any portion of this agreement shall be held unenforceable, invalid or inoperative, then, (a) the remainder of this agreement shall be considered valid and operative, and the remaining provisions shall be nevertheless carried into effect, and (b) insofar as it is reasonable and possible, effect shall be given to the intent manifested by the portion held unenforceable, invalid or inoperative, and such portion shall be reformed only to the extent necessary to make it enforceable.