JEE Advanced Model Paper 8 with solutions for online practice

continuous function y = f (x) is defined on [-7,5] . A(-7,-4) ,B(-2,6) ,C(0,0) , D(1,6) , E(5,-6) are consecutive points on the graph of ‘f’ and AB, BC, CD, DE are line segments. The number of real roots of the equation f [f(x)] 6 is