The heights (in cm) of 37 students in a class were recorded and arranged in the following grouped distribution:
Height (cm): 140–150 150–160 160–170 170–180 180–190
Frequency: 3 7 12 10 5
(a) Prepare the ‘less than’ cumulative frequency table for the above data.
(b) Identify the median class.
(c) Calculate the median height of the students, showing all steps clearly.