Q$1.$ A spring$-$mass$-$damper system is being excited harmonically. The spring stiffness is $4K\frac{N}{m},$ the mass is $10kg.$ the damper coefficient is $20N-\frac{s}{m}.$ The excitation force amplitude is $100N$ at a frequency of $1\mathrm{.}5Hz.$ If the system motion starts from the rest at $10cm.$

How much the displacement of the system will be after $6$ seconds?