$[8]$ Using a GC$/$MS analysis, drug money extract in a $5\mathrm{.}0mL$ methanol containing

cocaine gave a signal of $45644$ area counts. After $200L$ of $500\mathrm{.}0ppm$ cocaine

were added to the $5\mathrm{.}0mL$ methanolic extract, this spiked solution sample gave a

signal of $57055$ area count. $($i$)$ Find the concentration of cocaine in the original

extract in ppm and in molarity. $($ii$)$ Is this technique external standard, standard

addition, or internal standard method?