(a) 3-Phenylpropanoyl chloride, C₆H₅CH₂CH₂COCl, reacts with AlCl₃ to give a single product with the formula C₉H₈O and an ¹H NMR spectrum with signals at δ = 2.53 (t, J = 8 Hz, 2 H), 3.02 (t, J = 8 Hz, 2 H), and 7.2 – 7.7 (m, 4 H) ppm. Propose a structure and a mechanism for the formation of this product. 

(b) The product of the process described in (a) is subjected to the following reaction sequence: (1) NaBH₄, CH3CH2OH; (2) Conc. H₂SO₄, 100 8C; (3) H₂, Pd – C, CH₃CH₂OH. The final product exhibits five resonance lines in its ¹³C NMR spectrum. What is the structure of the substance formed after each of the steps in this sequence?