There are errors in the use of punctuation marks in the following text. Rewrite the text correcting the errors. Students : Excuse me sir I want to discuss with you some grammatical problems? Teachers : What class are you in Student : Sir I am in class XI I am a newly admitted student herel Teacher : Okay tell me your problems. Student : I want to understand the difference between a phrase and a clause Teacher : Don't worry. Ill help you understand the difference