Height functions on singular surfaces parameterized by smooth maps $\mathcal{A}$-equivalent to $H_k$

We study singularities of height functions on singular surfaces in $\mathbb{R}^3$ parameterized by smooth map-germs $\mathcal{A}$-equivalent to $H_k$ in Mond's classification, and the versality of the family of the height functions. We also study relations of the singularities of the height function