Let G be a simple connected plane graph with 6 vertices. (a) (b) (c) (d) What is the largest number of edges G can have? What is the least number of edges G can have? What is the largest number of...

answer d please,

a = 15 edges

c= 8 faces

Extracted text: Let G be a simple connected plane graph with 6 vertices. (a) (b) (c) (d) What is the largest number of edges G can have? What is the least number of edges G can have? What is the largest number of faces G can have? Suppose that the numbers obtained in (a) & (c) are m & f respectively, construct a simple connected plane graph with 6 vertices, m edges and f faces.