4. Carlos is a student at UCLA and agrees to rent an apartment froin Larry in Westwood pursuant to a written and signed lease agreement with a two-year lease term commencing September 1, 2017 and monthly rent of $1,000. After a year at UCLA however, Carlos decides he wants to transfer to the business school at CSUSM and he accordingly tells Larry on June 1, 2018 both verbally and in writing that he intends to vacate the apartment on or before September 14, 2018. Although apartments are notoriously in short supply in Westwood and Larry could easily re-rent Carlos' apartment, Larry is angry at Carlos' early departure and immediately sues Carlos for breach of the rental agreement. Explain the legal principle that Larry relying on to sue Carlos before he is in breach of the lease agreement? What defense may Carlos have by Larry's failure to try to re-rent the apartment