Explanation
Custom object and master detail field are two steps that should be configured to meet this requirement.
Custom object can be used to create a new object for shoe design that can store information about different designs and stages. Master detail field can be used to create a relationship between Product and Shoe Design that prevents deletion of Shoe Design records and allows multiple designs for one product. References:
https://help.salesforce.com/s/articleView?id=sf.customize_customobjects.htm&type=5https://help.salesforce.com

Explanation
To share report folders with different groups of users with different levels of access, an administrator can use folder sharing settings under setup. Folder sharing settings allow administrators to share report folders with public groups, roles, roles and subordinates, territories, or portal roles with view or edit access. In this case, the administrator can share the Helpdesk folder with Support Agents with view access so they can run Helpdesk reports but not edit them; and share the R&D folder with Support Managers with edit access so they can view and edit R&D reports.
References:https://help.salesforce.com/s/articleView?id=sf.reports_builder_folders_sharing.htm&type=5

Explanation
A sales process is a set of stages that an opportunity goes through as it moves from creation to close. It can be customized by administrators to match different business models or product lines within an org. Creating a new sales process can help Dreamhouse Realty define a different set of stages for its new home concierge offering that is unlike anything the company has offered in the past and follows a different business model.
Creating a quick action, a new approval process, or a new opportunity product are not solutions for creating a customized sales process; they are used for different purposes such as creating records, approving records, or adding products to opportunities. References:
https://help.salesforce.com/s/articleView?id=sf.customize_salesprocess.htm&type=5