In a Python program, a control structure:

1. Directs the order of execution of the statements in the program
2. Dictates what happens before the program starts and after it terminates
3. Defines program-specific data structures
4. Manages the input and output of control characters

Find the output of the following Python program:

for x in range(1, 20, 3):
   print(x, end =',')

1. 1,20,3,
2. 1,4,7,10,13,16,19,
3. 13,6,9,12,15,18,
4. 20,40,60,80,100,

An empty/null statement in Python is:

1. go
2. pass
3. over
4. ;

In Python, which of the following will create a block in a compound statement?

1. colon
2. statements indented at a lower, same level
3. indentation in any form
4. {}