### Run this cell before continuing. 
source("tests.R")
source("cleanup.R")

# Replace the fail() with your answer. 

# your code here
fail() # No Answer - remove if you provide an answer

test_1.1()

# Replace the fail() with your answer. 

# your code here
fail() # No Answer - remove if you provide an answer

test_1.2()

# Replace the fail() with your answer. 

# your code here
fail() # No Answer - remove if you provide an answer

test_2.1()

# Replace the fail() with your answer. 

# your code here
fail() # No Answer - remove if you provide an answer

test_3.1()

# Replace the fail() with your answer. 

# your code here
fail() # No Answer - remove if you provide an answer

test_4.1()

# Replace the fail() with your answer. 

# your code here
fail() # No Answer - remove if you provide an answer

test_6.1()

# Replace the fail() with your answer. 

# your code here
fail() # No Answer - remove if you provide an answer

test_7.1()

# Replace the fail() with your answer. 

# your code here
fail() # No Answer - remove if you provide an answer

test_8.1()

# Replace the fail() with your answer. 

# your code here
fail() # No Answer - remove if you provide an answer

test_9.1()

# Replace the fail() with your answer. 

# your code here
fail() # No Answer - remove if you provide an answer

test_10.1()