lbu $t0,string

A good answer might be:

It loads one byte (located at string) into the low order byte of register $t0. The other bytes are filled with zero.

Outline

Here is the outline of the program. The comments are for the major sections of the program. 

        .text
        .globl  main
main:  
        # ________________________

        # ________________________

        # ________________________

        # ________________________

        .data
str:    .space  128     # character buffer

Not much of an outline. Luckily, here are some phrases you can use to fill in the blanks: print the reversed string, push each character onto the stack, input the string into a buffer, and pop chars from stack back into the buffer.

QUESTION 11:

Fill the blanks with the correct phrases.