A student intends to synthesise 3-phenylpropanoic acid (Compound B) using the two-stage route shown below:

Plan a two-stage synthesis to prepare 5.40 g5.40\text{ g}5.40 g of Compound B starting from (2-chloroethyl)benzene, C6H5CH2CH2Cl\text{C}_6\text{H}_5\text{CH}_2\text{CH}_2\text{Cl}C6H5CH2CH2Cl. Assume that the overall percentage yield of Compound B from (2-chloroethyl)benzene is 45%45\%45%.
In your answer, include the mass of C6H5CH2CH2Cl\text{C}_6\text{H}_5\text{CH}_2\text{CH}_2\text{Cl}C6H5CH2CH2Cl required, reagents, conditions, and equations for both stages.