iPhone application development help required

We have a few doubts on iPhone application development. We have listed our doubts in the attached document. We are planning to have a session on Skype with the selected developer. Please answer any 2 questions from the document so we can understand your depth of knowledge and your power to explain. Those who would send the answers would be considered for this project. Please mention how much do you charge for 1 hour session also. We will have many more sessions like this with the selected developer.