Identify the major products $P,Q$ and $R$ in the following sequence of reactions:

1. Friedel-Crafts Alkylation: ${\text{CH}}_3{\text{CH}}_2{\text{CH}}_2\text{Cl}$ reacts with ${\text{AlCl}}_3$ to form a primary carbocation, which undergoes a 1,2-hydride shift to form a more stable secondary carbocation (${\text{CH}}_3{\text{CH}}^{+}{\text{CH}}_3$). This electrophile attacks benzene to form Isopropylbenzene (Cumene, $P$).2. Cumene Oxidation: Cumene reacts with air (${\text{O}}_2$) to form Cumene hydroperoxide.3. Acidic Hydrolysis: Cumene hydroperoxide is decomposed by dilute acid to yield Phenol ($Q$) and Acetone ($R$).