$1,$ What is alternative dispute resolution. Name $2$ types of alternative dispute resolution techniques and provide one benefit and one drawback of each.

$2.$ What is a contract? What separates a contract from other types of promises?

$3.$ Juan goes the gas station and says, "fill my tank up with regular gasoline; I'll pay cash". The attendant fills up Juan's tank and charges him $$31\mathrm{.}50$ for ten gallons of gas. The sign on the gas station says that gas is sold at a price of $$3\mathrm{.}10$ per gallon, for cash payers. What type of contract did Juan and the attendant from:

a$.$ Express contract

b$.$ Implied contract

c$.$ Unilateral contract

d$.$ Bilateral contract