$1.$ Using a breadboard, assemble a Wheatstone Bridge circuit, power it with a $9$ V battery, and use a battery snap to make the connection. Use resistors of known values. Remember that, according to the concept of the Wheatstone Bridge, all Rx resistors have the same value. Using two resistors of known values $($resistors that will be tested using the circuit$)$ and using a voltmeter as a means of display $($connected between terminals A and B $),$ answer the following questions:

$-$ What happens if a resistor with a value lower than Rx is placed at the test terminals?

$-$What happens if a resistor with a value greater than Rx is placed at the test terminals?

$-$ What happens if a resistor with a value of $\backslash (\backslash$mathrm$\{$R$\}=0\backslash )$ ohms is placed at the test terminals?

$-$What happens if a resistor with a value of $\backslash ($ R $\backslash )$ equal to infinity is placed at the test terminals?

$2.$ Develop a mathematical model so that, based on voltage measurements and the values of known resistors, the value of resistor Rx can be determined. This allows validating the reuse of desoldered resistors from electronic boards by comparing the calculated value from the system with the value indicated according to the resistor color code.

$2.$ Develop a mathematical model so that, based on voltage measurements and the values of known resistors, the value of resistor Rx can be determined. This allows validating the reuse of desoldered resistors from electronic boards by comparing the calculated value from the system with the value indicated according to the resistor color code.