Read the data inside customers.txt, get key-value pair, (custNum, custName)3.Compare key-value A and key-value B, if key-value B is NULL
2.Output key-value
And how many key-value pairs will there be in each file?There will be r files, each with exactly k/r key-value pairs.C.There will be r files, each with approximately k/r key-value</em