Oscillations and Waves: JEE Main 2022 Physics question

Two travelling waves of equal amplitudes and equal frequencies move in opposite directions along a string. They interfere to produce a stationary wave whose equation is given by $y = (10\cos \pi x\sin {{2\pi t} \over T})$ cm The amplitude of the particle at $x = {4 \over 3}$ cm will be ___________ cm.