In the context of ADTs, what does "encapsulation" refer to?

Statements: D = B ≤ I < L ≥ M = R; T = U ≥ L

Conclusion: I. D < U II. B = T

Statements: F > T = O > E < P ≤ X > H < M

Conclusion I: F ≥ E

II: X > E

In a certain code CHARM is written as 715$# and AVOID is written as 56@%8. How is CHORD written in that code?

Statements: Q $ Z % C # T @ H 

Conclusions: 

I. Z # H 

II. Q © T 

III. H % Z

Statements: D > E > F ≥ G = H; D ≤ I < J ≤ B; H ≤ K = M < L

Conclusions:

I. M ≥ I

II. H > I

III. L > F

Statements: M = N ≤ P = C > G, D ≥ M > T = F

Conclusion:

I. D ≥ N

II. N > F

III. F < P

Statements: O > M = Q > S; M ≥ K > A; Q ≤ O < E

Statements: U ≤ T < V; W < V; S = T < R; X < W = Y < Z

Conclusions:

I. R > U

II. X < S

III. T < Z

Statements: J # Q, Q * D, D % P, P $ Y