Q2xii

Consider the following program skeleton and below figure which shows activation records of procedures involved in the calling sequence.

$$p \rightarrow s \rightarrow q \rightarrow r \rightarrow q.$$

Write the access links of the activation records to enable correct access and variables in the procedures from other procedures involved in the calling sequence

procedure p; procedure q; procedure r; begin q end r; begin r end q; procedure s; begin q end s; begin s end p;