Which sentence below is INCORRECTLY punctuated?

a. Last week we had a huge snowstorm.
b. Help me shovel my driveway please?
c. Be careful not to slip on the ice.

b. Help me shovel my driveway please?

The sentence that is INCORRECTLY punctuated is option b. "Help me shovel my driveway please?"

To determine which sentence below is incorrectly punctuated, we need to review the punctuation rules and apply them to each sentence.

a. Last week we had a huge snowstorm.
This sentence is correctly punctuated. It begins with a capital letter and ends with a period, which is the appropriate way to punctuate a statement.

b. Help me shovel my driveway please?
This sentence is incorrectly punctuated. While it begins with a capital letter and ends with a question mark, it is missing a comma before the word "please." To properly punctuate this sentence, it should be written as, "Help me shovel my driveway, please?"

c. Be careful not to slip on the ice.
This sentence is correctly punctuated. It begins with a capital letter and ends with a period, which is the appropriate way to punctuate a statement.

Therefore, the sentence that is incorrectly punctuated is option b. "Help me shovel my driveway please?"