In a human cardiac cycle, the blood flow of a major human artery, with an internal diameter of $4\mathrm{.}8$ mm$,$ is $5\mathrm{.}2$ cm$\text{'}.$s$.$ The artery bifurcates $($splits$)$ into two identical blood vessels that are each $3$ mm in diameter. What are the average velocity and the mass flow rate upstream and downstream of the bifurcation?The density of blood is $1\mathrm{.}06$ g$.$cm$.$