### A good answer might be:

See below.

# Subroutine Call

    #  main()
    #  {
    #    int a;
    #    a = mysub( 6 );
    #    print( a );
    #  }

             .text
             .globl  main
    main:
                                      # prolog
             sub     $sp,$sp,4        #   1. Push return address
             sw      $ra,($sp)
             sub     $sp,$sp,4        #   2. Push caller's frame pointer
             sw      $fp,($sp)
                                      #   3. No S registers to push
             sub     $fp,$sp,4        #   4. $fp = $sp - space_for_variables

             move    $sp,$fp          #   5. $sp = $fp

                                      # subroutine call
                                      #   1. No T registers to push
             li      $a0,___          #   2. Put argument into $a0
             jal     _______          #   3. Jump and link to subroutine

                                      # return from subroutine

             . . . .

                                      # epilog
             jr      $ra              # return to OS

### QUESTION 10:

Fill in the blanks.