1. **Problem Statement:** Redraw the circuit of Figure 4 to include: (a) an ammeter to measure the circuit current (b) a voltmeter to measure the applied voltage (c) a voltmeter to measure the voltage drop across resistor R3 (d) an ammeter to measure the current through resistor R2 2. **Understanding the Circuit:** The circuit consists of a voltage source $V_t = 20$ volts and three resistors in series: $R_1 = 470\ \Omega$, $R_2 = 820\ \Omega$, and $R_3 = 1200\ \Omega$. 3. **Key Concepts:** - An **ammeter** is connected in series to measure current. - A **voltmeter** is connected in parallel to measure voltage. 4. **Placement of Instruments:** - (a) To measure the total circuit current, place an ammeter in series with the circuit, for example, between the voltage source and $R_1$. - (b) To measure the applied voltage $V_t$, place a voltmeter in parallel across the voltage source terminals. - (c) To measure the voltage drop across $R_3$, place a voltmeter in parallel across $R_3$. - (d) To measure the current through $R_2$, place an ammeter in series with $R_2$. 5. **Summary:** - Ammeter for total current: series with entire circuit. - Voltmeter for $V_t$: parallel across voltage source. - Voltmeter for $R_3$: parallel across $R_3$. - Ammeter for $R_2$ current: series with $R_2$. This completes the redrawing instructions with correct instrument placements.