Write the steps to carry out the conversion of phenol to aspirin.

(N/A) The conversion of phenol to aspirin involves two main stages:
$1$. Conversion of phenol to salicylic acid (Kolbe's reaction):
Phenol is treated with $NaOH$ to form sodium phenoxide. This is then reacted with $CO_2$ at $400 \ K$ and $4-7 \ atm$ pressure,followed by acidification with $H^+$ to yield salicylic acid.
$2$. Acetylation of salicylic acid:
Salicylic acid is reacted with acetic anhydride $(CH_3CO)_2O$ in the presence of an acid catalyst $(H^+)$. This process,known as acetylation,replaces the phenolic hydrogen with an acetyl group to form aspirin ($2$-acetoxybenzoic acid) and acetic acid $(CH_3COOH)$.