Write a shell script calculator.sh that performs basic calculator functions such as addition (+), subtraction (-), multiplication (x) and division (/). The program takes as parameters An integer value for the left operand. A character that represents the type of operation to be performed, identified by one of the characters (+, -, x, /) respectively. An integer value for the right operand. and outputs the result of the operation as an integer. If the requested operation would require a division-by-zero, your program should print an error message Division-by-zero Error! and not a result.