Represent 7.2 on the number line.
a. (i) Express 7.2 in the form nm, where m and n are positive integers.
b. (ii) Using a suitable unit so that your construction can be carried out with whole-number lengths, obtain a line segment whose length is 7.2. Write all steps of construction clearly.
c. (iii) Transfer the point obtained in part (ii) to the original unit number line and state the value of 7.2 correct to two decimal places.