v"-(%f), where C, 5 and a are positive constants, and n > 6 is an integer parameter. V(r) describes the potential energy of a twoatom molecule as a function of the distance 7* between the atoms. The variable r is restricted to the domain 7" > 0. 4. (*ijfz'g) What is the effect on the model of increasing the value of the parameter 7;? Explain your answer mathematically, and then explain it in terms of the physical phenomenon being described