Create .png files

Convert PPT slide to multiple .png files as follows: 1. Two versions of each dimension - one transparent, one with current background. 2. png format @ 72 DPI 3. Following dimensions: - 985 x 215 pixels (2 files - transparent and background) - 450 x 80 pixels (2 files - " ") - 250 x 50 pixels (2 files - " ") - 375 x 105 pixels (2 files - " ") 4. pdf file is attached ******PLEASE REMOVE "MARCH 2013" FROM BOTTOM RIGHT CORNER - DO NOT WANT THAT AS PART OF NEW FILES*****