Vs $=10$ V

R$1=120$

R$2=150$

R$3=200$

R$4=270$

$$

The following statements were made about this circuit:

$1)$ The output voltage of this circuit equals $1\mathrm{.}21$ V

$2)$ If resistors R$2,$ R$3,$ and R$4$ are kept at their listed values, and only R$1$ is varied, the bridge is balanced when R$1=202$

$3)$ If resistors R$1,$ R$2,$ and R$3$ are kept at their listed values, and only R$4$ is varied, the bridge is balanced when R$4=160$

$$

Assume $5\%$ error margin and choose the correct answer below: