Trees and spanning trees

Vertices in listed order: [E | A | B | G | C]. Full edge list: B–G, A–C, C–G, E–C

Vertices in listed order: [E | A | B | G | C]. Full edge list: A–C, C–G, E–C

Vertices in listed order: [E | A | B | G | C]. Full edge list: B–G, A–C, C–G, E–C, A–C

Vertices in listed order: [E | A | B | G | C]. Full edge list: B–G, A–C, C–G, E–C, E–A