Using the Ontario Building Code, determined the level of safety requirements, including requirements for the fire$-$resistant rating and fire separation for the building. Show all your work and state any assumptions and indicate the articles that you have used:

a$)$ Building with $2$ units. An RBC Bank with an area $300$m$2$ and a child daycare center with anarea of $500$m$2.$ The building is $2$ stories high, facing $2$ streets and unsprinkelred.