What is the output of 'dna'+1+2+3 ? Given a string variable called dna, for instance: >>> dna='agcagttagcta'. What is a correct way to count the number of occurrences of 'ag' in dna? What is the value of the variable seqlen, after the following code is entered in Python: >>> seqlen = '10bp' >>> seqlen='2'+seqlen >>> seqlen=seqlen*2

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A: the program code is given below :

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A: Here is the program given below:

Q: In python please

A:

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A: According to the Question below the Solution:

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A: The Python code is given below with code and output screenshot Happy to help you ?

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Topological Sort

Topological sort is a sorting technique that sets up a hierarchy in a process. In this technique, when a directed network has nodes connected by arrows, the root node is placed before the successor node.