Answer:
Python
file=open("file_name",r) #Opening the file we are using
f1=file.readlines() #Read each line of the file and save it into f1 vector
for x in range(len(f1)): #walk through every line in vector f1 and print it
print(x+1, ".",f1[x]) """x+1 because the index begin in 0 so we add 1, ":" colon, f1[x] to take the x line"""