A lead$-$zinc ore was treated at the rate of $200tph$ to produce two concentrate streams as shown

above. $P$ is the Lead $(Pb)$ concentrate stream and $Z$ is the $Zn$ concentrate stream.

Using the following assays $($given in $\%)$ and the three product formulae, determine the mass flow

of lead and zinc in all three product streams, $P,Z$ and $T.$