. Model the following, showing any necessary calculations.

a) 2/5 x 2/3 (using a rectangular array)

b) 2 ¼ = 9/4 (using circles)

c) 1 ¾ + 1 2/3 (using a number line subdivided according to the LCD)

d) 6/10 = 3/5 (using rectangles)

e) 0.3 = 0.30 (using decimal squares

explain please and thank you. even if you can only help me with one or two