24 cause 25% is basically 1/4 so its 4 times 6 so its 24
Yes, because both of them have a 70 degree angle on T and W
You need 16 more terms not 17 because you already have 4 terms in the series so if you add those 4 terms to the other 16 terms to the series you get a total of 20 terms in total. I hope this helped.
