a$)$ Write a computer program to read the relevant branch data of a pow er system with $n$ busses and to construct the complex nxn bus admittance matrix $(Y_{\text{B}\text{U}\text{S}}).$ You can utilize MATLAB $($preferred$)$ or write your code using C$,$ C$++$ or Python.

The input data file is given and is named ieeells.txt$.$ Here, first line show s the number of busses, then line data $($Frombus#$,$ Tobus#$,$ series R$,$ series X$,$ total line charging B and tap ratio for transformers$)$ are listed up to the termination row with the value $-999.$ The following data block gives the bus data $($Bust$,$ shunt $G$ and shunt B$)$ until the termination line of $-999.$ You can neglect the tap ratios in your computations. You can use the given Pseude Code to read the input data file in MATLAB.

If you use MATLAB, publish your code as a $.$pdf file and upload both this $.$pdf file and $.$m file to LMS$.$ Otherwise, upload your code file to LMS$.$

b$)$ Run the program on IEEE $118-$bus test system to obtain the Y BUS of the network. Submit $($list$)$ only the non$-$zero entries of the first $3$ rows of $Y_{\text{B}\text{U}\text{S}\text{.}}$ Also submit the visualization of the sparsity pattern of your resulting $Y_{\text{B}\text{u}\text{s}on}$ an $A4$ paper. You can use spy$(.)$ function of MATLAB for this purpose.