Power of Attorney for Lucia Sitar

This filing is an exhibit (Exhibit 24) containing a Power of Attorney granted by Lucia Sitar, a reporting person and Vice President, to a group of individuals including Jennifer Nichols, Megan Kennedy, Alan Goodson, James O’Connor, Nicola Espie, Matt Woodward and Jeffrey Cotton. This power of attorney authorizes the appointed individuals to act on behalf of Lucia Sitar in executing and filing Forms 3, 4, and 5 with the SEC and any stock exchange, as required by Section 16 of the Securities Exchange Act of 1934. The attorneys-in-fact are empowered to perform all necessary actions, including obtaining EDGAR codes, and their actions will be considered as if performed by Sitar herself. The power of attorney remains in effect until Sitar is no longer required to file these forms or until it is revoked in writing. The document was signed by Lucia Sitar on September 17, 2012.