10 What is the second least popular phone colour among customers?

11 List all the customers who are not active. A customer should be considered not active if they have no active phone number registered under their name.

12 What plan is most popular among customers who are born before the 1960s?

Assessment 2 Data Implementation - Case Study The following case study models a mobile phone company. The company has a number of phones that are sold by staff to various clients. Each phone comes with a plan and each plan has a number of features specific to that plan including: - a call charge in cents per minute (this does not apply to all plans) - a plan duration in months - a break fee if the customer leaves the plan before the end of the plan duration - a monthly data allowance in gigabytes Assumptions that are made for the assignment are: - mobile phones are locked to a plan for the length of the plan duration Entity-Relationship Diagram Relational Model