Multiple choice

The circuit shown in figure is a 4-bit DAC The input bits 0 and 1 are represented by 0 and 5 V respectively. The OP AMP is ideal, but all the resistances and the 5V inputs have a tolerance of $\pm$10%. The specification (rounded to the nearest multiple of 5%) for the tolerance of the DAC is

  1. $\pm$35%
  2. $\pm$20%
  3. $\pm$10%
  4. $\pm$5%
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