QUESTION: Fix punctuation: Solve the jigsaw puzzles before the time is up
ANS: Solve the jigsaw puzzles before the time is up!
QUES: The figures below show lamp lumen maintenance factor LLMF in over time k 1000 h and number of light source shifts up to 50000 hours for various light sources

correct the punctuation.

CORRECTED: The figures below show lamp lumen maintenance factor (LLMF in %) over time (k = 1000 h) and number of light source shifts up to 50,000 hours for various light sources.
Question: Reflector housing in diecasted aluminium metallised PC reflector and driver housing in polycarbonate
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Answer: Reflector housing in die-casted aluminium, metallised PC reflector and driver housing in polycarbonate.
And although it may seem paradoxical to many younger people this itself has been a major challenge

Can you repeat this sentence, but add in punctuation?
And although it may seem paradoxical to many younger people, this itself has been a major challenge.
input: A3 Paper Acrobat Template Standard Poster Size
fixed: A3 Paper Acrobat Template | Standard Poster Size
11 September 2011 Mie Kirstine

Can you repeat this sentence, but add in punctuation?
11. September 2011 Mie Kirstine