audio manipulation

Hello, we have Audio file (Speech) where we made mistake in text. To avoid make it again we need manipulate the file in a way, that it sounds ok In details: in the 10 seconds aufio file on time 05 seconds Speaker says. ... synchronous motors reach .... you change this to ... and reaches .... so you need a) to cut out the "synvhronous motors" what is a 2 seconds job b) then add an "and" - we give you another audfio file with many "and" s from this speacking session and you select the best obe and insert it c) the tricky part. add an "es" to the reach - you get file where you find words end on "es", to select one. Finally you must smoothen it to sound like its really spoken and not cutted For someone familiar with audio this is a 5 minutes job Pls start your bid with "and reaches" to identify all the generic bids, that even do not habve the respect to read a job before bidding thanks a lot for your help