Two reactions are used in the synthesis of a pharmaceutical compound.
Reaction 1: Methylbenzene is reacted with a mixture of concentrated nitric acid and concentrated sulfuric acid at 50°C to form 1-methyl-2-nitrobenzene and water.
Reaction 2: Ethanoyl chloride is reacted with an excess of methylamine to form N-methylethanamide and ammonium chloride.
Describe the type of organic mechanism that occurs in each reaction. Use the terms electrophilic substitution and addition-elimination in your answer.