please answer all the questions

- Explore dynamic chart of bond duration -What happens when the number of payments / year is increased? - What happens when the annual coupon rate is decreased to zero? -What is the relationship between the duration of a zero coupon bond and time to maturity? - Does an increase in the time to maturity always increase the duration of a coupon bond or is it possible for it to decrease duration at some point? Asked differently, does the red curve always go up or can it be hump-shaped