Answer from cs61c-ej (Leon Wang 16247444) for Question 3
I do not understand the following paragraph on page 112:

Since 8-bit bytes are useful in many programs, most architectures address individual bytes.  Therefore the address of a word matches the address of one of the 4-bytes within the word.  Hence, addresses of squential words differ 4.  

The second sentence makes the least sense.  The logic just doesn't flow and I don't understand what's going on.  

Also, I couldn't figure out a way to do question two without "addi".  If k were a number, I don't know how to make a certain register contain 1 so that I can add 1 to the register with k.