Hi I need help how to answer this question? Use IRAC? thus question about business law Genuine Consent Contract

5 . Padmapalasaki and Chandrakantha purchase an Indian restaurant from Priya . It is located in Glen Waverly , south-east of Melbourne . In order to ensure she does not establish a similar restaurant in the same vicinity , they include a term in the contract that prohibits Priya " owning or managing" a restaurant within a 20 - km radius of the restaurant for five years . Advise them whether this term would be an illegal restraint