In Canada, the normal resting pulse (bpm) of people aged 60-79 years follows a median distribution of 65 bpm. Its first quartile is approximately 58 bpm and the third quartile is 72 bpm. Based on the information the proportion of people who have a pulse of 58 bpm or more is:

a. 0.50

b. Can't be determined with this information

c. 0.75

d. 0.25