## Question 1
From the given list of employee schedules, find the list of intervals representing the free time for all the employees.

[[[3, 5], [8, 10]], [[4, 6], [9, 12]], [[5, 6], [8, 10]]]
### Options

1. [[2, 8]]
Incorrect

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2. [[6, 8]]
Correct
The employees’ common free time is [6, 8], because none of them has an activity scheduled at this time.
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3. [[2, 6]]
Incorrect

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4. [[4, 6]]
Incorrect

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## Question 2
From the given list of employee schedules, find the list of intervals representing the free time for all the employees.

[[[1, 3], [5, 6], [9, 10]],[[2, 4], [7, 8]], [[8, 11], [12, 14]]]
### Options

1. [[4, 5], [6, 7], [11, 12]]
Correct
The employees’ common free time is in intervals [4, 5], [6, 7], and [11, 12], because neither of them has an activity scheduled at this time.
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2. [[4, 5], [11, 12]]
Incorrect

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3. [[3, 5], [6, 7], [11, 14]]
Incorrect

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4. [[4, 5], [6, 7], [11, 12], [13, 14]]
Incorrect

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## Question 3
From the given list of employee schedules, find the list of intervals representing the free time for all the employees.

[[[1, 2], [3, 4]], [[2, 3]], [[4, 6]]]
### Options

1. [[2, 3]]
Incorrect

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2. [[3, 4]]
Incorrect

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3. []
Correct
There is no free time available.
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4. [[3, 5]]
Incorrect

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