Puzzle on ins, sel, rad

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Across
  1. 3. Consider an array has 10 elements and the searching element is at array index 6. A starting element is present at index zero. How many comparisons(answer in words) are required to search an element using linear search?
  2. 5. Consider an array of positive integers between 123456 to 876543,___________ sorting algorithm can be used to sort these number in linear time?
  3. 7. What is the key operation in Insertion Sort?
  4. 8. Sorting method that repeatedly selects the minimum element?
Down
  1. 1. In binary search, _________ bound is updated when item to be found is greater than a[mid]
  2. 2. What's the time complexity of Radix Sort?( linear/ quadratic/ poly, etc)
  3. 4. What is the time complexity of insertion sort in the worst case?( linear/ quadratic/ poly, etc)
  4. 6. The basic idea behind insertion sort: "Divide and _____."