Can someone help I’m stuck on this question

Write a net ionic equation to show that hydrofluoric acid, behaves as an acid in water.

According to the diagram; a) identify the anode of the cell and write the half-reaction that occurs there b) write the overall equation for the reaction that occurs as the cell operates c) calculate the value of the standard cell potential ,e cell. d)write the shorthand notation of the cell above e)indicate the flow of the electrons on the diagram

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li