You can open the svgs diagrams here: 

https://app.diagrams.net/#Uhttps%3A%2F%2Fgitty.informatik.hs-mannheim.de%2F3029257%2FProgrammiertestat_2%2Fraw%2Fbranch%2Fmain%2FUML.svg

https://app.diagrams.net/#Uhttps%3A%2F%2Fgitty.informatik.hs-mannheim.de%2F3029257%2FProgrammiertestat_2%2Fraw%2Fbranch%2Fmain%2FVersandkostenpreis%2520Netto%2520berechnung.svg
 
Or download and open it with drawio.

Time Chart:

1:40 for UML and understanding of the Exercise

0:40 for Creating Java project with UML defined Classes.

0:06 creating constructors

0:02 finish class Kunde

0:06 finish class Produkt

0:02 finish class Bestellung

0:38 finish class Warenkorb

0:45 finish class OnlineShop

2:10 finish class ShopTUI

1:50 add tests and final finish

8h to complete the Exercise.