I am at the part where you take the elevator up to the 7th floor, then walk around and go into an office, and then crawl through some ac ducts until you get to another floor. Then you drop down and go into a room that leads up to the roof. On the roof, you rapple down and break through some glass and then your in an office with a guard already there. The only problem is every time I burst through the glass he kills me easily. What should I do?
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