Nikita Enterprises has bonds on the market making annual payments, with $16$ years to maturity, a par value of $$1,000,$ and selling for $$968.$ At this price, the bonds yield $8$ percent. What must the coupon rate be on the bonds?

If interest rates suddenly rise by $3$ percent, what is the percentage change in the price of these bonds?

Note: A negative answer should be indicated by a minus sign. Do not round intermediate calculations and enter your answers as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

If rates were to suddenly fall by $3$ percent instead, what would be the percentage change in the price of these bonds?