Pre-Laboratory Assignment 1. Consider the following series circuit. Derive a formula to calculate voltage V₁ in terms of R1, R2, R3, R4, and Vs. Repeat for V2, V3, and V4. Vs + + V1 w R1 - - + ½ www R2 R3 ww + RA Figure 1. Series Circuit with Four Resistors Page 1 of 6 2. For the following circuit, derive a formula for R₂ in terms of R1, V2, and Vs. + ww R1 محمد www + Figure 2. Series Circuit with Two Resistors 3. Consider the following combination series/parallel circuit. Note that each of the nodes is numbered 0 (reference node or "ground"), 1, or 2. 1 41 + V₁ - 2 + R₁ R2 INT + N ww R3 3 +13 0 Figure 3. Combination Series/Parallel Circuit a. Derive a formula for the total resistance R₁ "seen by" Vs in terms of R1, R2, and R3. b. Derive a formula for the current I₁ in terms of R1, R2, R3, and Vs. c. Use the current divider rule to find a formula for I₂ in terms of I1, R2, and R3. d. Use the current divider rule to find a formula for I, in terms of I1, R2, and R3.