Draw a histogram to represent the following grouped frequency distribution:

Ages (in years)	Number of teachers
$20-24$	$10$
$25-29$	$28$
$30-34$	$32$
$35-39$	$48$
$40-44$	$50$
$45-49$	$35$
$50-54$	$12$

(N/A) The given frequency distribution is in inclusive form. To draw a histogram,we must first convert it into an exclusive (continuous) form. We do this by calculating the adjustment factor: $\frac{\text{Lower limit of next class} - \text{Upper limit of current class}}{2} = \frac{25-24}{2} = 0.5$. Subtract $0.5$ from each lower limit and add $0.5$ to each upper limit.

Ages (in years)	Number of teachers
$19.5-24.5$	$10$
$24.5-29.5$	$28$
$29.5-34.5$	$32$
$34.5-39.5$	$48$
$39.5-44.5$	$50$
$44.5-49.5$	$35$
$49.5-54.5$	$12$

Now,plot the ages on the $x$-axis and the number of teachers on the $y$-axis to construct the histogram.