What multiplication facts are illustrated by these rectangular area models?

(a)

012345012345 A grid has a horizontal axis labeled from 0 to 5 in increments of 0.5 and a vertical axis labeled from 0 to 5 in increments of 1. A rectangular region of the grid is shaded, with a width of 9 grid squares and a height of 5 grid squares.

(b)

01201 A grid has a horizontal axis labeled from 0 to 2 in increments of 0.33 and a vertical axis labeled from 0 to 1 in increments of 0.25. A rectangular region of the grid is shaded, with a width of 4 grid squares and a height of 3 grid squares.

(c)

01234501 A grid has a horizontal axis labeled from 0 to 5 in increments of 1 and a vertical axis labeled from 0 to 1 in increments of 0.2. A rectangular region of the grid is shaded, with a width of 5 grid squares and a height of 4 grid squares.

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Part 1

(a) The model illustrates the multiplication fact

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(Type an equation.)