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Internet security -Fiestel Cipher

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Let the input of a Feistel cipher be 10100101 and the complex function ‘F’ be simple XOR with the session key 1100. Then the output is?

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10100101 

L=1010 & R=0101

now first copy R as a L of Result i.e 0101

and apply function F on R with Key which is given XOR in this case so,

0101 XOR 1100 = 1001

now again XOR this with L of input i.e. 

1001 XOR 1010 = 0011

Hence final answer will be 01010011

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