Hello, @chandnibhandary 
Welcome to the Canvas Community! You probably don't realize that you've posted a question about pathology in a forum where people gather to exchange their ideas about using Canvas software. For assistance with subject matter, please use the appropriate discussion designated by your instructor, and if you arent' sure where the appropriate place is for this post, ask the instructor via direct message (How do I send a message to a user in a course in the Inbox as a student?).
As this is not a homework help site, we've locked the question to future participation.
