A rectangular barge weighing $200,000$ kg is $14$m long, $8$ m wide and $4\mathrm{.}5$ m deep. It will transport to Cebu $20$ mm diameter by $6$ m long reinforcing steel bars. If a draft $($submerge depth of the barge$)$ is to be maintained at $3$ m$,$ how many pieces of rebars can it carry? What is the draft of the barge when one half of its cargo is unloaded in fresh water? Use density of salt water to $1026$ kg$/$cu$.$m$.$ Steel weighs $7850$ kg$/$cu$.$m