Tiling a Trapezium/Trapezoid with a Pentiamond and a Hexiamond

A pentiamond is a plane figure formed by joining 5 equilateral triangles edge to edge.

A hexiamond is a plane figure formed by joining 6 equilateral triangles edge to edge.

A trapezium is a quadrilateral with just two sides parallel. In the U.S. and Canada it is known as a trapezoid, because of a mixup in a popular 18th-century English dictionary of mathematics. For details, see this Wikipedia page.

A polyiamond with the shape of a trapezium is isosceles. That is, its two sides that are not parallel are equal.

Here I show the smallest trapezium with full symmetry that can be tiled by a pentiamond and a hexiamond, using at least one copy of each. The solutions shown are not necessarily uniquely minimal. I admit triangles as a degenerate case of trapezia. If you find a smaller solution or solve an unsolved case, please write.

In the table, the figures indicate the numbers of polyiamond cells in the solutions.