Esters are sweet-smelling substances and are used in making perfumes. Suggest an activity and the reaction involved for the preparation of an ester with a well-labeled diagram.

(N/A) Activity:
$1$. Take $1 \, mL$ of ethanol (absolute alcohol) and $1 \, mL$ of glacial acetic acid in a test tube.
$2$. Add a few drops of concentrated sulphuric acid to the mixture.
$3$. Warm the mixture in a water-bath at about $60 \, ^\circ C$ for at least $15 \, \text{min}$ as shown in the diagram. (Note: It should not be heated directly on a flame because ethanol is highly flammable).
$4$. Pour the contents into a beaker containing $20-50 \, mL$ of water and smell the resulting mixture. $A$ sweet,fruity smell indicates the formation of an ester.
Reaction:
$CH_3COOH + CH_3CH_2OH \xrightarrow{Conc. H_2SO_4} CH_3COOCH_2CH_3 + H_2O$
(Ethanoic acid + Ethanol $\rightarrow$ Ethyl ethanoate + Water)