What would be the value of the Head Pointer (HP) and Tail Pointer(TP) and the queue after the letters G and R are inserted, three letters are removed and the letters D P are inserted as noted in the problem NOTE fig 8.14

Once starbucks had established its presence in thousands of cities internationally, the company sought to increase the number of purchases by existing customers with a strategy that led to new in-store merchandise, including compilation cds and high-speed wireless access.

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Description: write function lastfirst() that takes one argument—a list of strings of the format "lastname, firstname" —and returns a list consisting of two lists: (a) a list of all the last names (b) a list of all the first names