4) Graph the function by keeping b= 1 fixed and vary the parameter a as follows: i) a = 2, ii) a = 3, ii) a = 4, and iv) a = 5. By examining all the graphs, describe the changes you see in the graph as parameter a increases.What role does the parameter a play in the resulting shape of the bumpy sphere?

Fig: 1

Fig: 2

Fig: 3