$[$Student$]--(1$:N$)--[$Studies At$]--(1$:N$)--[$University$]$

$[$Customer$]--($M:N$)--[$Buys$]--($M:N$)--[$Item$]$

$[$Passenger$]--($M:N$)--[$Books$]--($M:N$)--[$Flight$]$

$[$Car$]--($M:$1)--[$Financed By$]--(1$:N$)--[$Bank$]$

based on this can i get a image