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Two-Feet Shoes started operations as a small retailer of high-end footwear in Christchurch. Over the years, the business has expanded its network with branches across all major towns in the South Island. Although much has changed since the business started, one aspect that has not altered much is its documentation process, which uses a file system. An extract from the Two-Feet Shoes Sales file is presented below: Customer_name Customer_address Customer_phone Salesperson Shoe_model Shoe_amount Date There has been a Britney Micaw 2 Abberley Cres 03 1234 5678 Tim VZ4717 $129.90 20-Jul-20 change of Michelle Burford 6 Fairway Drive 03 9876 4321 Cox DF3966 $79.50 30-Jul-20 management at the Phillipa Musick 8 Akaroa Street 03 5678 3456 Miller WE9447 $150.30 4-Aug-20 company, and new Sales Devine Smith 3 Glade Avenue 03 2376 1048 Jeffrey XC8187 $145.50 6-Oct-20 Manager Susan Malcolm is keen to move the company's sales documentation from a master file to a database system. To convince the senior management team of the importance of using a database system, she needs to provide evidence of the limitations of a file system as well as the benefits a database system can offer. Required You have been contacted by Susan to help as per below: . Explain a relational database system AND discuss at least two problems that could be associated with large tables as those used by Two-Feet Shoes under a file-based legacy system. (6 marks)