Let a→=a1i^+a2j^+a3k^,b→=b1i^+b2j^+b3k^ and c→=c1i^+c2j^+c3k^  be three non-zero vectors  such that c→ is an unit vector perpendicular to both a→ and b→ if the angle between  a→ and b→ is π6 then the value of a1    b1    c1a2    b2    c2a3    b3    c32 is