A continuous-time signal x(t) is composed of a linear combination of sinusoidal signals of frequencies 300Hz, 500Hz, 1.2kHz, 2.15kHz, and 3.5kHz. The signal x (t) is sampled at a 3.0- kHz rate, and the sampled sequence is passed through an ideal lowpass filter with a cutoff frequency of 900Hz, generating a continuous-time signal y(t). What are the frequency components present in the reconstructed signal y(t)?