add assignment for nest layout-weight
remove unnecessary param
Add layout xml for fundamental 1st assignments2
Add sample image for fundamental 1st assignments2
resize image
Implement advanced assignment for layout
Add sample image for layout assignment
Replace image for layout practice 5
Fix practice session for layout 6
Replace image for practice 6 of layout
Replace image for layout practice session 1
Replace image for layout practice session 2
Replace image for layout practice session 3
Fix practice session for relative layout 2
Replace image for layout practice session 4
Replace image for layotu practice session 7