3. Pseudorandom generators Let F,G: {0,1}{0,1]2 be pseudorandom generators. For each of the functions below, prove or disprove that H is necessarily a pseudorandom generator. 1) H(s): F(s)||G(s), where "" denotes concatenation. 2) H(5081 Sn-1):G(Sn-18n-2... 80), where 80, 81, 8n-1 are single bits