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iOS Object-Oriented Objective-C Memory, Arrays and Loops, Oh My! Review Dictionaries and Arrays

I am having issues adding the values in our array to our new dictionary.

here is my code:

  1. NSArray *shoeOrder = @[@"Charles Smith",@(9.5),@"loafers",@"brown"];
  2. NSMutableDictionary *shoeOrderDict = [[NSMutableDictionary alloc] init];
  3. [[shoeOrderDict objectAtIndex:@"customer",@"size,@"style",@"color"] forKeys:shoeOrder];

issue is at the 3rd part of the challenge its where I got lost. Please help!

variable_assignment.mm
NSArray *shoeOrder = @[@"Charles Smith",@(9.5),@"loafer",@"brown"];
NSMutableDictionary *shoeOrderDict = [[NSMutableDictionary alloc]init];
[[shoeOrderDict objectAtIndex:@"customer",@"size",@"style",@"color"]valueForKey:shoeOrder];