A had a nephew B, to whom, when B was 17 and 2months old, A loaned $2,000 for his educational expenses. In return B gave A a promissory note calling

for repayment (without interest) two years from the date of the note. On year later B quit school and joined the army. Two months after B's nineteenth birthday, on the due date, A demanded payment. B refused. Can A collect?Explain