$4.$ Consider of a six$-$month promissory note for $$966$ dated September $16,2019,$ with interest at$5\mathrm{.}45\%.(10$ points$)$a$.$ What is the maturity date of the note?b$.$ How much is the maturity value of the note?c$.$ What is the price of the note on November $4,2019,$ if money is worth $5\mathrm{.}75\%$