Yields for the following corporate bonds are listed in the table below along with their bond rating.

a$.$ If the yield on a government of Canada bond is $2\mathrm{.}50\%,$ then the risk premium on Bond #$4$ is $\%.($Round your response to two decimal places.$)$

b$.$ What is a likely range of yields for a corporate bond with a BB rating?

Must be above: $,\%$ Must be below: $,\%($Round your responses to two decimal places.$)$