Q.6.35. Please need help with this question. This is Cryptography course.

6.35. Let b1 and b2 be vectors, and set t=b1b2/b12andb2=b2tb1. Prove that b2b1=0 and that b2 is the projection of b2 onto the orthogonal complement of b1. 6.35. Let b1 and b2 be vectors, and set t=b1b2/b12andb2=b2tb1. Prove that b2b1=0 and that b2 is the projection of b2 onto the orthogonal complement of b1