Convert VB class (PC) to Objective C class (iPhone)

We have **2 classes in Visual Basic 6**? with some mathematical functions that we need to convert into **Objective C language for iPhone** ## Deliverables We have created 2 classes with complex mathematical functions to calculate distances and directions between 2 point on the earth.? The other class calculates sunrise / sunset for any position on the globe for any date.? Finally, the combination of the 2 classes delivers the daylight and night time for a flight from A to B along the route. These classes work fine in Visual Basic 6.? We want to convert these classes to iPhone Objective C language for implementation into an existing iPhone? application. We will provide you with several samples of input/output to allow verification of your coding.? ? The 2 classes are attached to this bidding.