Show the first eight words of the key expansion for a 128-bit key of all zeros in an AES encryption scheme. Use the algorithm as shown in the figure given below where the function g is given as follows:

a. a circular one byte circular left shift on the input word.

b. a substitution on each byte of the word using the AES 256 byte S-BOX

c. An EXOR with a Round Constant which for round one is given as (01,00,00,00) hex

I am trying to understand how to read this and understand what to do. Please explain how you come up with the answer.