Hello, I'm a complete newcomer to Racket. I've just begun working my way through HTDP, and have run into problems with exercise 6.2.1, which uses draw.ss. When I load the file, Racket complains when I make any reference to the "posn" struct (which is essential to all of the drawing tools), saying that it hasn't been defined. If I change tactics and try to start from the standard "beginner's" language (which does include the necessary "posn" definitions) and then copy over and run the declarations from draw.ss, that produces a "module not defined" error. I'd appreciate any guidance. Thanks for your time! Jay
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