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# To analyze the recurrence relationship, you may use the stack of bricks recursion, the substitution method, or

another proof technique of your own choosing.

2 Quickselect with median-of-medians pivots (10 marks) In class, we saw a worst—case analysis of Quickselect using median of medians pivots.
This pivot was the median of those medians taken from % groups (each group being of
size 5), and the resulting runtime was 0(n). Show that if we instead use % groups of
size 7, then the resulting runtime is still 0(a). To analyze the recurrence relationship,
you may use the stack of bricks recursion, the substitution method, or another proof

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