a$.$ Consider this imaginary and simplified process to produce finished magnesium coins from magnesium ore: $(5$ marks$)$

Magnesman Cre

Finished $5.$oums

$\backslash$table$[[$Mite Process,Hpus$($mach$)($cton$),,,],[$Refining$,1425000,$Mg Ore,$367000,$Mg$],[$Extrusion$,525000,$Mg$,515000,$Mg Bars$],[$Molding and Cutting,$50000,$Mg Bars,$35000,\backslash$table$[[$Rough$],[$Coins$]]],[$Grinding$,35000,$Rough Coins,$34300,$Finished$],[,,,,$Coins$]]$

Calculate the mass of each materiai $($ Mg ore, Mg$,$ Mg bars and rough coins$)$ required to produce $1000$ metric tons of finished coins. Embodied energy of magnesium $=315M\frac{J}{k}g$

i$.$ How does the embodied energy compare with the total processing energy when manufacturing $1000$ metric tons of finished magnesium coins? Calculate the difference in percentage.

ii$.$ If magnesium is replaced with $50\%$ recycled Mg with recycling demanding $\frac{1}{10}$ th of energy requirement compared to refining, what will be the embodied energy of the finished coins now?