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+clc
+// Fundamental of Electric Circuit 
+// Charles K. Alexander and  Matthew N.O Sadiku  
+// Mc Graw Hill of New York 
+// 5th Edition 
+
+// Part 1   :  DC Circuits 
+// Chapter 2:  Basic Laws 
+// Example 2 - 9
+
+clear; clc; close; 
+//
+// Given data
+R1 = 5; 
+R2 = 1; 
+R3 = 2; 
+R4 = 6; 
+R5 = 3; 
+R6 = 8; 
+R7 = 4; 
+//
+// Calculations
+// R1 Series R2 
+Rs1 = R1 + R2; 
+// R4 Parallel R5
+Rp1 = (R4*R5)/(R4+R5); 
+// R3 Series Rp1
+Rs2 = R3 + Rp1; 
+// Rs2 Parallel Rs1
+Rp2 = (Rs1*Rs2)/(Rs1+Rs2); 
+// Rp2 Series R6 and R7  
+Reg = R6 + Rp2 + R7; 
+//
+// Display the result
+disp("Example 2-9 Solution : ");
+printf(" \n Rs1 = R1 Series R2      = %.3f ohm",Rs1)
+printf(" \n Rp1 = R4 Parallel R5    = %.3f ohm",Rp1)
+printf(" \n Rs2 = R3 Parallel Rp1   = %.3f ohm",Rs2)
+printf(" \n Rp2 = Rs1 Parallel Rs1  = %.3f ohm",Rp2)
+printf(" \n Reg = R6 + Rp2 + R7     = %.3f ohm ",Reg);
+