X Wished to Purchase a Motor Vehicle from Y on Credit,but

True/False

X wished to purchase a motor vehicle from Y on credit,but X was unemployed,and Y was hesitant to sell to him for that reason.Z,who was quite wealthy,said to Y: "Sell X the automobile on credit,and if X does not pay you,I will." If Z made the guarantee in writing,and signed the document,the guarantee would not be enforceable until X defaulted on a demand for payment by.