Anyone explain this problem

Q83. A Hamiltonian system is described by the canonical coordinate q and canonical momentum p. A new coordinate is defined as Q(t)=q(t+r)+p(1+T), where t is the time and r is a constant, that is, the new coordinate is a combination of the old coordinate and momentum at a shifted time. The new canonical momentum P(t) can be expressed as (a) pttr)-9(t+) (b) p(t+r)-g(1- r) ([p-)-a(+] )[p+)-v(t+5)] Ans. : (d)