9) Consider in an orthonormal system of axes (x'Ox, y'Oy), the points A(0,1), B(6, 1) and C(6, -1). Let M and N be the midpoints of [AC] and [BC]
respectively.
a) Locate A, B and C.
b) Calculate the coordinates of M and N.
c) Write the equations of the lines (AB), (AC) and (BC).
d) Determine the equation of the perpendicular bisector of [AC].
e) What is the nature of triangle ABC?
f) Calculate the radius of the circle circumscribed about triangle ABC.

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer