Resolution retroactively approving Modification Nos. 3 and 4 to extend the contract and to increase the amount of the contract by $15,906 for a total amount not to exceed $328,376; and approving Modification No. 5 to extend the term of the contract for a total term of June 1, 2011, through December 31, 2021, between the Arts Commission, the Municipal Transportation Agency and Catherine Wagner LLC, to provide designs and consult on the fabrication and installation of artwork to be displayed in the Central Subway.