Question: plot horizontal and vertical axis interchange

Dear sir,

i want to change the horizontal and vertical axis in maple plot. on horizontal axis  i  want velocity  u(y) values and on vertical axis y values i am attaching the file also My codes are 

U:=(y^2-2*h*y)*(-(5/2)*c1/(2*h^2*a^2+5));

 c1:=1:

 h:=1:

  a0:=subs(a=1,U):

 a1:=subs(a=1.5,U):

 a2:=subs(a=2.5,U):

 a3:=subs(a=3.5,U):

 a4:=subs(a=4.5,U):

 a5:=subs(a=5,U):

  plot([a0,a1, a2,a3,a4,a5], y=0..1, title = " Velocity profile for c1=1 and h=1", legend = [alpha = 1, alpha= 1.5,alpha= 2.5,alpha= 2.5,alpha= 4.5,alpha= 5], titlefont = ["ROMAN", 15], labels = ["y ", "u(y)"], labeldirections = ["horizontal", "vertical"], labelfont = ["HELVETICA", 10], style = [POINT],symbol = [BOX,CROSS,CIRCLE,DIAGONALCROSS,DIAMOND,SOLIDBOX],color = [black, black,black,black,black,black], axesfont = ["HELVETICA", "ROMAN", 8], legendstyle = [font = ["HELVETICA", 9], location = bottom],axes=boxed);