Complete thedialogue using the sentences

Exercise 6. Complete thedialogue using the sentences
A. Do you understand all of them?
B. Can you help me with this, please?
C. Can you say that again, please?
D. why don't you use the calculator?
E. How about a textbook?

Katie: Hi Alex. Why do you look so sad?
Alex: Oh, I am stuggling with my maths homework. (1) ............
Katie: Yes, sure. (2).............
Alex: No. My teacher doesn't permit calculator
Katie: Alright. Let me guide you through these exercises.
Alex: That's so kind of you.
Katie: (3).......... . Please apply what you learned on the maths exam tomorrows
Alex: Absolutely. Thanks, Katie