Can you please make a DIAGRAM to explain answers and explain. Please dont copy chegg.

A typical earthquake produces two types of seismic waves. P (\"primary\") seismic waves are longitudinal waves that move through the earth's upper crust at about 3 km/s to 5 km/s (depending on the crust composition). 8 (\"secondary") waves are transverse waves that move about 60% slower. An observer with a seismograph can distinguish between these types of waves. if an observer receives the P waves from an earthquake about 12 s before the S waves, roughly how far is the observer from the epicenter? (Give an approximate range.)