Answer and Explanation:
The development of output indices for the plant is presented below:
For Base Year 2007
Index with output 100000 (Presumed) 100
For Output index 2009
(180000 ÷ 100000) × 100 180
For Output index 2010
(250,000 ÷ 100,000) × 100 250
For Output index 2011
(200,000 ÷ 100,000) × 101 200
In this way, it should be developed