arrays in data structure | one dimensional array memory representation

Explain the memory representation of one dimensional array with an example
1. Suppose an array A having base address as 2500 and each element takes 8 memory cells and the array’s starting index is 9 then calculate the address of element at index 20 in the array
2. Suppose an array Y[-2:7] having base address as 1000 and each element takes 10 memory cells then find the location of 3rd element of array.
3. Suppose an array X[7:19] having base address as 1500 and each element takes 4 memory cells then find the location of 5th element of array. 
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[fazalmunshi]

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