A signal x$($t$)=4$cos$(100$t$)+3$cos$(150$t$)$ is sampled at a frequency of $$s$=140$ rads$/$sec$.$ The Fourier transform of the sampled signal x$[$n$]$ is of the form

Xs$()=...+$a$1$$(1)+$a$2$$(2)+$a$3$$(3)+$a$4$$(4)+...$

where $0<1<2<3<4$ is in units of rads$/$sec$.$