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A planar truss tower structure is shown in the figure.

Consider the following statements about the external and internal determinacies of the truss.

  1. Externally Determinate
  2. External Static Indeterminacy $=1$
  3. External Static Indeterminacy $=2$
  4. Internally Determinate
  5. Internal Static Indeterminacy $=1$
  6. Internal Static Indeterminacy $=2$

Which of the following options is correct?

  1. P-False; Q- True; R-False; S-False; T-False; U- True
  2. P-False; Q- True; R-False; S-False; T-True; U- True
  3. P-False; Q- False; R-True; S-False; T-False; U- True
  4. P-True; Q- True; R-False; S-True; T-False; U- True
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