Answer:
P-R interval Time(s): 0.3-0.48 and 1.1-1.25
QRS interval time(s): 0.48-0.55 and 1.25-1.33
Q-T interval time(s): 0.48-0.85 and 1.25-1.6
R-R interval time(s): 0.5 and 1.29
Explanation:
P wave is the first little bump before the huge mountain
R wave is the huge mountain. The graph give a scale on how to measure them and combined both P and R wave.
QRS is the drastic up and down you see on the graph. Again, the graph provided a scale on how to measure it.
T wave is the medium sized bump after the huge mountain. The graph gave a scale on how to measure them and combined Q (from QRS) and T.