A \(5 \mathrm{~kg}\) block is mounted on a helical coil spring such that the system's natural frequency is \(50 \mathrm{rad} / \mathrm{s}\). The block is subject to a harmonic excitation of amplitude \(45 \mathrm{~N}\) at a frequency of \(50.8 \mathrm{rad} / \mathrm{s}\). What is the maximum displacement of the block from its equilibrium positions?