Figure displays the waveforms of four signals s1 (t), s2

Figure displays the waveforms of four signals s1 (t), s2

Figure displays the waveforms of four signals s1 (t), s2 (t), s3 (t) and s4 (t).
(a) Using the Gram-Schmidt orthogonalization procedure, find an orthonormal basis for this set of signals.
(b) Construct the corresponding signal-spacediagram.