C

In this problem we won't be needing arrays and will instead 19 the concept of ens inlentine the base class to inherit from will be called Expression. The description of the different derived clusus that we will implement are as follow Class Variable has a name and a value and inherits from Expression. Classes Unary and Binary inhent from Expression. - Class Unary has one operand that is reference to an expression object, Clasers UMinus and UNegation inherit from ele onary Clase Binary las two operates that are reference to expreson objects . Clases paus, Mus, Mult, Dr. Lan, Sale, other than craneo inherit from class Binary Cine Expression has abstract (nure virtual print. Vervuan computevalue methode. Classes Variable, UMENIS, UNegation, plus. Minus, - Ararat implement these methode aequately. Note thnt ench method in those can only care about its own begin Implement the same scenarios from Problem i instantiation a pontingcodle should look at simple and readable as the following: int main() { Variable ("x"), Variable y("y"): Variable z("z"): UMinus ux(x): Mult m(y,ux); Plus p(x,z); Div a(p.m): UMinus ud(a): Div d2(y,z); Bigger b(ud, d2); UNegation ub(b): ub.print(); x.setVarValue (5); y.setVarValue (5); z.setVarValue (5); int val - ub.computeValue(); cout