D=4, R=18, E=5, A=1, M=13 (position in alphabet). S=19, L=12, E=5, E=5, P=16.

In circular arrangement: B-A-C order with A between B and C. D opposite B. E left of A means E-A-C arrangement. F must be opposite A.

From the given statements, we cannot conclude that some teachers are researchers as researchers may only come from non-teacher educators.

Net displacement: 6 km East and 4 km North (8-4). Distance = √(6² + 4²) = √(36+16) = √52 = 2√13 km

C→G (shift -6), O→I (shift -6), etc. Each letter is shifted 6 positions backward in the alphabet.

D is leftmost. A is right of D. C is right of D but left of B. B is rightmost. Order: D-A-C-B

Each letter is shifted backward by 1. G→F, A→Z, R→Q, D→C, E→D, N→M = FZQDCM

X is uncle of Y. Y is sister of Z. So X is also uncle of Z. Z is father of W. Therefore, W is nephew of X.

From A<B<D and A<C and E is heaviest. Testing: A<B, A<C, B<D, E heaviest. A is lightest.

Fibonacci sequence where each number is sum of previous two. 8+13=21