Solution :
Here, we need to perform JOIN operation of the students and registration.
Use NATURAL JOIN operator and so no need to specify Join condition.
Also we need to selection operator tp select only those course whose major in "philosophy".
Finally we projection operator π to project only distinct students name who took at least three courses.
Answer:
## http://pastebin.com/nQWtHb3B
#use above link for formatted program #Python3
c=[float(cord) for cord in input('Enter a point with 2 coordinate :').split(' ')]
base=[0,0]
w=10
h=5
if((abs(c[0]-base[0])<= float(w)/2) and (abs(c[1]-base[1])<= float(h)/2)):
print('Point (',c[0],', ',c[1],') is in the rectange')
else:
print('Point (',c[0],', ',c[1],') is not in the rectange')
