Answer:
Following are the solution to the given choices:
Step-by-step explanation:
Given:
double currentBalance[91];//defining a double array 
In point a: 
The name of the array is= currentBalance. 
In point b: 
91 double values could be saved in the array. It requires 8bytes to hold a double that if the array size is 91*8 = 728 
In point c: 
Each element's data type is double. 
In point d: 
The array index range of values is between 0 and 90 (every array index starts from 0 and ends in N-1, here N=91). 
In point e: 
To access first element use currentBalance[0], for middle currentBalance[91/2] , for last currentBalance[90]