Redesign back DTK tshirt

Today i have made something difference to DTK thirt design
so this is how it look...
i hope i will get comment that can improve my skills

this i design because one of my friend request with his logo

this one 3 design i make it by myself
not much difference because i dont have much idea
the criteria for our own class tshirt should be simple but formal...
not like secondary school class tshirt