c
Real depth    \(=\,5\,cm\,\,+\,\,1\,cm\,=\,6\,cm\)

Apparent depth   \(=\frac{\mathrm{d}_{1}}{\mu_{1}}+\frac{\mathrm{d}_{2}}{\mu_{2}}+\dots\)

\(=\frac{5}{1.33}+\frac{1}{1.5}\)

\( \simeq 3.8+0.7 \simeq 4.5 \mathrm{cm}\)

\(\therefore \text { Shift }=6 \mathrm{cm}-4.5 \mathrm{cm} \cong 1.5 \mathrm{cm}\)