Hello!

I have to create a program in Python. I have to set a function, which accepts as an argument the epicentral distance and returns the travel time of the first arriving wave

so What i have thought about is:

#Calculate the distance from the source

def traveltime(dist): ''' CALCULATE THE MINIMUM ARRIVAL TIME OF THE P WAVES KEYWORD ARGUMENT: D= EPICENTRAL DISTANCE ''' direct_waves=dist+1 refractive_granite=(dist/6)+1 refractive_vasalt=(dist/6.6)+3.6 refractive_mantle=(dist/7.9)+6.9 #Now i have to find the minimum traveltime and return it return

dist=input("Enter the distance:")

But it doesnt work, plus I do not know how to find the minimum travel time

Thank you very much in advance