$$\text { Figure } 6 ^ { \prime } 2$$

Multiple Choice

$$\text { Figure } 6 ^ { \prime } 2$$
-If V_S=15 V and every resistor equals 2.2 $k \Omega$ in Figure 6-2, what is the value of I_R4 ?

A) 5.11 mA
B) 2.55 mA
C) 0.85 mA
D) 0.42 mA