Project: mobx
Task (easy): 1) Make blog items in BlogList selectable. When an item in BlogList is selected, highlight it with appealing style and display its content in the Blog Component. 
2) Set 'Morning' as the default selected blog. 
3) Beautify the List without changing the size of List Item
4) Use MobX to manage the selected blog. Use observer in mobx-react-lite to auto update.