(a) Draw a plot showing the variation of potential energy of a pair of nucleons as a function of their separation . Mark the regions where the nuclear force is :
(i) attractive and (ii) repulsive.
(b) In the nuclear reaction
`n+underset(92)(235_(Uto))underset(54" ")(a_(Xe+))underset(b" ")(94_(Sr+2n))` determine the values of a and b .