Quiz (1 point)
Given that:
    
    
subtract immediate instruction with dst: 1 src: 1 and immediate: 1 at 5
    
    the PC at time 18 = 5
    
    value of cell 1 at time 18 = 124
    
    Prove that:
value of cell 1 at time 19 = 123
The following properties may be helpful:
    - 18 + 1 = 19
- 124 - 1 = 123
- if the following are true: - subtract immediate instruction with dst: dst src: src and immediate: imm at i
- the PC at time t = i
 - then value of cell dst at time (t + 1) = (value of cell src at time t) - imm 
- if 18 + 1 = 19, then value of cell 1 at time (18 + 1) = value of cell 1 at time 19 
- if the following are true: - a = b
- a = c
 - then b = c 
- if a = b, then a - c = b - c 
- if the following are true: - a = b
- b = c
 - then a = c 
- if the following are true: - a = b
- b = c
 - then a = c 
Please write your proof in the table below. Each row should contain one claim. The last claim is the statement that you are trying to prove.