A note on the Tuza constant $c_k$ for small $k$

For a hypergraph $H$, the transversal is a subset of vertices whose intersection with every edge is nonempty. The cardinality of a minimum transversal is the transversal number of $H$, denoted by $\tau(H)$. The Tuza constant $c_k$ is defined as $\sup{\tau(H)/ (m+n)}$, where $H$ ranges over all $k$-uniform hypergrpahs, with $m$ and $n$ begin the number of edges and vertices, respectively. We give upper and lower bounds on $c_k$, for $7\leq k\leq 17$.