An old sailing ship has three triangular sails, sail A, sail B and sail C. Sail A, the smallest of sails, measures 6 m along the base and between 5 and 8 m in height. Sail C, the largest of the sails, has an area less than twice the area of sail A.

What could be the areas of the three sails? Complete the table by giving the possible base, height, and area for all three sails

Sail A:

Base: 6 m
Height: Between 5 m and 8 m
Area: Between 15 m² and 24 m²

Sail B:
Base: Between ? and ? m
Height: Between ? and ? m
Area: Between ? m² and ? m²

Sail C:
Base: Between ? and ? m
Height: Between ? and ? m
Area: Less than twice the area of Sail A