Bond Orion and Bond Vega both feature a coupon rate of $9$ per cent, make semiannual payments, and are priced at par value. Bond Orion has $3$ years to maturity, while Bond Vega has $20$ years to maturity. $($Do not round intermediate steps. Round your answers to $2$ decimal places $($e$.$g$.,32\mathrm{.}16).$ The program includes a margin of error of $+/1\%.$ Negative values should be indicated by a minus sign.$)$

Requirement $1$:

If interest rates suddenly rise by $2$ per cent, what is the percentage change in the price of Bond Orion?

Percentage change

$\%$

Requirement $2$:

If interest rates suddenly rise by $2$ per cent, what is the percentage change in the price of Bond Vega?

Percentage change

$\%$

Requirement $3$:

If rates were to suddenly fall by $2$ per cent instead, what would the percentage change in the price of Bond Orion be then?

Percentage change

$\%$

Requirement $4$:

If rates were to suddenly fall by $2$ per cent instead, what would the percentage change in the price of Bond Vega be then?

Percentage change

$\%$