Consider: 

scores = {"Asha": 6, "Ben": 4, "Cara": 6, "Dan": 8} 

passed = [] 

distinct_scores = set() 

for name in scores: 

    if scores[name] >= 6: 

        passed.append(name) 

        distinct_scores.add(scores[name]) 

Explain what values name takes during the loop and what scores[name] retrieves. [2 marks] 

After the loop finishes: 

• What is stored in passed?
• What values are in distinct_scores?
• Why do these two collections have different lengths? 

You may give the set’s values in any order. [3 marks] 

The following code now runs: 

saved = distinct_scores 

saved.add(10) 

print(10 in distinct_scores) 

State the output and explain why it occurs. [2 marks] 

Answer these two independent questions: 

• If saved = distinct_scores.copy() had been used instead, would adding 10 to saved also change distinct_scores? Explain briefly. Assume that 10 was not already present. [1 mark]
• A student tries to retrieve an element using distinct_scores[0]. Explain why this does not work. [1 mark] 

What do these percentages tell you about the downprojection? Are these good values in your opinion?