#2&4 - You are right, from a purly semantical or logical basis.

#3 is perhaps the most dificult of these silly questions.  It provides for the posibility that the egg containing a chicken might have been laid by a chicken or a non-chicken, and to answer correctly one would have to have some understanding of genetics.  To get an answer, let us turn to Christopher Michael Langan:  "reproductive mutations separating a new species from its progenitor generally occur in reproductive rather than somatic DNA and are thus expressed in differences between successive generations, but not in the parent organisms themselves.  While the somatic (body) cells of the parents – e.g. wing cells, drumstick cells and wishbone cells - usually contain only the DNA with which they were conceived, germ (reproductive) cells like ova and spermatozoa contain non-somatic DNA that may have been changed before or during mating by accidental deletion, insertion, substitution, duplication or translocation of nucleotide sequences.  This is what causes the mutation that results in the new species." 

"Where an animal qualifies as a member of a given species only if its somatic DNA (as opposed to its reproductive DNA) conforms to the genotype of the species, the parents of the first member of a new species are not members of that new species.  At the same time, all the biological evidence says that the ancestors of modern chickens were already oviparous or egg-laying…that a male and a female member of the ancestral species of the modern chicken, call this species “protochicken”, mated with each other and created an egg.  (Could the first chicken have evolved from a viviparous or live-bearing species, and after being born alive, have started laying eggs?  All the biological evidence says “no”.)  But because their act of mating involved a shuffling of reproductive genes that were not expressed in the body of either parent – if they had been expressed there, the parents would themselves have been members of the new species - the fetus inside the egg was not like them.  Instead, it was a mutant…a modern chicken!"

So the answer to 3 is most certianly, the egg.