Give the condensed structural formula for

Give the condensed structural formula for (a) Penta-1,4-diene
(b) Hexa-1,3,5 triene.

(a) C${{H}{2}}$ = CH—C${{H}{2}}$—CH = C${{H}{2}}$
(b) C${{H}
{2}}$ = CH—CH = CH—CH = C${{H}_{2}}$.