A company record its employee's movement In and Out of the office on a table with 3 columns

(Employee id, Action (In/Out), Created)

There is NO sample data for this question. You only need to submit the queries

Employee id	Action	Created
1	In	2019-04-01 12:00:00
1	Out	2019-04-01 15:00:00
1	In	2019-04-01 17:00:00
1	Out	2019-04-01 21:00:00

• The first entry for each employee is In
• Every In is succeeded by an Out
• No data gaps and, the employee can work across days

Question:

1. Find the number of employees inside the Office at 2019-05-01 19:05:00