IOS (Swift 4) - App Development - Ongoing opportunity

We are searching for a IOS (Swift 4) developer to write some basic code which can then be integrated with our existing iOS project. Each code module we require will come with very clear requirements for what is to be accomplished. Ideally we are looking to build a long term relation with a IOS developer to help finish out MVP then build out our apps function and make bug fixes. Please only bid on the project if you have experience coding with Swift 4 and Firebase (IOS) We have 11 code modules that need to be completed, below you will find details on the first 3. Please provide an estimation on how many hours you think it would take to implement the first 3 modules: module 1: Fix view controller scrolling Provided Files: Assignment 1 - Project18 Assignment Description: The app currently has a bug where it will navigate between pages using the page turn method, we would like it to turn via the scroll transition. Function: - navigate left or right between the pages using a swipe - navigate left or right between the pages using navigation bar items Objective: 1. modify code so that the view controller transition with scroll style transition, if this is not possible create a new project with the exact same function Notes: 1. The code can be fixed in the [login to view URL] file, please open the project to see more code comments 2. please place a comment above all lines of code that are added and/or modified module 2: Facebook login Provided Files: continue with code from module 1 Assignment Description: Use Firebase platform set up authentication via Facebook Objective: 1. make the app launch to the the “Authentication view controller” (only if the user is not logged in) 2. find the “Facebook login button placeholder” and replace this with FirebaseUI Facebook login button then set up Facebook authentication using firebase 3. After the user has been authenticated the app must launch to “two view controller” each time it is launched (i.e.: only need to login/authenticate one time) 4. write code to retrieve the following from the users Facebook profile: Name, Age, Occupation, Display picture, UID (facebooks unique identifier for each user) Relevant links: [login to view URL] [login to view URL] module 3: Firebase Database Provided Files: continue with code from module 2 Assignment Description: Set up database storage using Firebase Objective: 1. Setup Firebase database 2. Create code to add the following database entry with the data taken from the Facebook profile in assignment 2: “Users”{ “UID”{ Name Age Occupation Display picture 3. Create code to delete the database entry above 4. create code to modify the occupation of the database entry above