Workflow Editor Branch Activity

[ShivangiC]

I am facing an issue in configuring the correct workflow for the below requirement. Also attached the created workflow, Please let me know the correction to be made.

When req item is created, 1st task must be created with name 'Confirm COD'. When 1st task is completed, 2nd task must be created 'Update Tracker'. on 2nd task we have 2 choice fields-- 'New Equipment-- with Yes and No options' and 'Old Equipment-- with Yes and No options'. if user selects 'Old Equipment->Yes', then an incident record must be created.
if user selects 'New Equipment->Yes', then 3rd task must be created with name 'Select Customer'. Once 3rd task is Closed Complete, 4th task will be created named 'Request for Bill'. Once 4th task is Closed Complete, 5th task will be created with name 'Submit Bill'.
Once 5th task is Closed Complete, the Approval must be triggered to 'Hardware' group. If approver approves it, next task must be created named 'Confirm Delivery'. If request is rejected, again from the 3rd task actions will be repeated. If both Old Equipment and New Equipment are yes then run both the branches in parallel and otherwise they must be branched in different directions.
 Once if the final task is marked as Closed Complete,RITM is marked as Closed Complete and the flow will be ended.

I am confused in Branch and join activity.