give the differences between orbit,orbital,shell,subshell

Q.

What is the difference between shells, subshells and orbitals??

Q. The number of orbitals in the shell in which the h-subshell first arises is:

Q. What is the total number of orbitals in the shell to which the $g$-subshell first arise?

Q. Which of the following options is/are correct for a shell having principal quantum number n = 5?

Q. How many degenerate orbital are present in a subshell if electron associated with that subshell possesses orbital angular momentum$=2\sqrt{3}h$?