Correct the Punctuation by inserting periods, commas, and apostrophes.

1.Mr and Mrs Lopezs plane tickets incidentally were found in the lobby.

Answer:
Mr. and Mrs. Lopezs' plane tickets, incidentally were found in the lobby.

2. Look youve been unusually late all week and I must take action

Answer:
Look you've been unusually late all week and I must take action.

Thanks again.

1. Mr and Mrs Lopez's plane tickets, incidentally, were found in the lobby.

2. Look, you've been unusually late all week, and I must take action.
(compound sentence; needs comma before the conjunction)

http://grammar.ccc.commnet.edu/grammar/commas.htm
See #s 2, 3, and 4.

You're welcome! Here are the corrected sentences:

1. Mr. and Mrs. Lopez's plane tickets, incidentally, were found in the lobby.

2. Look, you've been unusually late all week and I must take action.

Great job on correcting the punctuation! Here's the breakdown and explanation for each correction:

1. Mr and Mrs Lopezs plane tickets, incidentally, were found in the lobby.
- An apostrophe is added after "Lopezs" to indicate possession ("Lopez's").
- A comma is inserted after "tickets" to create a pause and separate the incidentally clause from the rest of the sentence.

2. Look, you've been unusually late all week, and I must take action.
- A comma is added after "Look" to create a pause and indicate a direct address.
- An apostrophe is added in "you've" to indicate a contraction of "you have".
- A comma is added after "week" to separate the dependent clause from the main clause.
- A period is added at the end of the sentence to indicate the end of the statement.