Flutter social app

Specifications for the app called: Talkabout Group voice chat app Login screen: -Enter username field -Continue button (directs user to home screen) Home screen: -Scrollable list of active rooms ---Display room name (directs user to the room) ---Display username of creator -Bottom: Create room button Create room screen: -Back button -Enter room name field -Create room button (directs user to room) Room screen: -Top: Name of the room. -Body: Scrollable grid of users (4 in a row, as many rows as needed). ---When an user joins, display avatar in last place ---When an user leaves, remove its avatar ---Use a default icon as avatar. Display username below avatar. -Bottom: Mute microphone/unmute microphone button. If If unmuted: person is active. If person active: voice of user is heard by all other people in the room until user is in the room. If muted: person is silenced. If person is silenced: voice is not heard by anyone. -Bottom: Exit room button (direct user to home screen) Primary color: #FF9D6E Background: White Text and icons on primary color: White Text and icons on background: Black You can do frontend only if you find executing the group voice chat difficult In your proposal please tell me: How many working hour you need for each feature.