The light vehicle market share (in percent) in a particular country for pickup trucksis shown in the graph. Let x = 0 represent 1995, x = 4 represent 1999, and so on.(a) Use the points on the graph to write equations for the line segments in theintervals [0,4]and (4,8].(b) Define this graph as a piecewise-defined function f(x).Percent(a) The equation for the line segment in the interval [0,4] is y=.(Simplify your answer. Use integers or decimals for any numbers in theexpression.)