Files and Functions Challenge Questions

Hello,

1. How come there is no video @ the end of this section going over the solution to the 6 Questions in this sectio
2.  Regarding Question 4:

Q4:
1) Create a new file called "capitals.txt" ,
2) store the names of five capital cities in the file on the same line.
THis was # My Humble attempt:
#--------------------------------------------
f = open('capitals.txt','w') # Correct
f.write('Toronto, Montreal, Vancouver, Calgary, Winnipeg')
f.close()
f = open('capitals.txt','r')
print(f.read())
ACTUAL SOLUTION:
file = open('capitals.txt','w')
file.write('London, ')
file.write('Paris, ')
file.write('Madrid, ')
file.write('Lisbon, ')
file.write('Rome,')
file.close()
f = open('capitals.txt','r')
print(f.read())

My Question Q4:  is my method of lumping the 5 capitals into one "f.write()" function a viable alternative...it print on one line :)
Regards,

Matt