Write down the algorithm for cyclic exchange of values of three variables a, b, c. Cyclic exchange scheme

Write down the algorithm for cyclic exchange of values of three variables a, b, c. Cyclic exchange scheme: a arrow b arrow c and another arrow c goes to a. For example, if before the exchange it was: a = 1, b = 2, c = 3, then after the exchange it should become: a = 3, b = 1, c = 2. Run tracing.

Let’s write this program in Pascal:
Course of action:
1) a = 1, b = 2, c = 3
2) a = 3, b = 1, c = 2
Trace is done like this:
b: = a;
a: = c;
c: = b;