I need a 350 to 500 word essay, with references for the following question:1) Which type of contract

I need a 350 to 500 word essay, with references for the following question:1) Which type of contract

I need a 350 to 500 word essay, with references for the following question:1) Which type of contract, bilateral or unilateral, is more common in business? Why? Under what circumstance would someone prefer one or the other? What are the advantages of each type for the offeror? For the offeree?