Glazzy Opticon performs laser eye surgery in a purpose-built facility. The cost per operation in £, y, depends on the number of operations conducted per week, x, as follows:
![272_929e534a-10ee-455c-aa49-f232bfb8f8c2.png](https://secure.tutorsglobe.com/CMSImages/272_929e534a-10ee-455c-aa49-f232bfb8f8c2.png)
(a) How many operations should be undertaken per week to minimize the cost per operation?
(b) Confirm by means of the second derivative that the cost equation will reach a minimum when this many operations are performed.
(c) What is the minimum cost per operation?