Mass of the sound reflector is given as

mass of the chain itself is

now here since this system is suspended at rest and no acceleration is given for the system so in order to find the tension in the chain we will just use force balance equation
As per force balance we can say that weight of the chain and reflector downwards will be counter balanced by tension in the string
Now here we will have

since chain is given with some mass so tension at the top end of the chain will be


So here tension in the chain will be 1744.4 N at the top end and this tension will decrease as we move down along the length of the chain.