For the system shown in figure, the string is light and pulley is frictionless. The \( 4 \mathrm{~kg} \) block is given an upward velocity of \( 1 \mathrm{~m} / \mathrm{s} \). The centre of mass of the two blocks will [neglect the impulse duration] (1) accelerate down with \( g / 3 \). (2) initially accelerate downwards with \( g \) and then after some time accelerate down with \( g / 3 \). (3) initially accelerate with \( \vec{g} \) and then the acceleration is 0 (4) initially accelerate with \( \vec{g} \) and then with accelerate with \( g / 9 \). 📲PW App Link - https://bit.ly/YTAI_PWAP 🌐PW Website - https://www.pw.live