Norman thank you so much for sharing your knowledge, basically during performing the observation we were reminded not to take the distance measurement...

Hey there Mark, thanks so much for dropping by and answering the question. but I got a question to ask, based on what I understand, the purpose we ass...

@norman-oklahoma, thanks so much i would be happy to do that. I'll attach the input data that I have key in here.

thank you so much sireath on your explanation, I kinda get it but I will try to see first what I can to correct this.but what I understand from your e...