Editing pictures in Adobe Photoshop

Several pictures need to be edited in Adobe [login to view URL] background colour needs to be changed to white. and the logo which I will be providing should be appropriately placed on the [login to view URL] pictures will be uploaded for the brand on the website and so high quality work is demanded. I want only the highly skilled people to post replies as I want the edges of the pictures to be clear as these pictures have to be posted on the website and there will also be a zooming lens on the pictures which will enable the customers to see the design properly. this work needs to be completed within 24-48 hrz and no more than that..Before any person is assigned any task,I will want them to edit for me 3 pictures and send in their [login to view URL] the quality of their work they will be assigned the task. if you do well on this task,in the future you will be contacted for more assignments of this sort. thank you