Write down the equations of chemical reactions for the preparation of the following esters

Write down the equations of chemical reactions for the preparation of the following esters: a) methyl formate b) ethyl butyl ether c) butyl butyl ether

Let us write down the equations for the synthesis of organic substances – ethers:
a) НСООН + СН3ОН = НСОО – СН3 + Н2О – esterification reaction, ethyl formate (methyl formate) was obtained;
b) Н3С – СН2 – СН2 – СООН + С2Н5ОН = Н3С – СН2 – СН2 – СОО – С2Н5 + Н2О – in the course of the reaction, oil ethyl ether (ethyl butyrate) was formed;
c) Н3С – СН2 – СН2 – СООН + С4Н9ОН = Н3С – СН2 – СН2СОО – С4Н9 + Н2О – during the esterification reaction, butyl butyl ether (butyl butyrate) was obtained;
These reactions show a bond between carboxylic acids and alcohols. The products of the esterification reaction are esters, which are used as solvents and are also used in the food industry for the production of essences.