A BITTER BREW: FOR SRI LANKA'S TEA ESTATE WORKERS, FAIR WAGE IS STILL ELUSIVE Sri Lanka's tea estate workers want a daily wage rate of 1,000 rupees. In January, trade unions and tea plantations negotiated an increase in the wage rate by 40 percent to 700 rupees a day. Academics says that even the 1,000 rupee-a-day wage is less than what workers need to live. Source: thehindu.com, October 5, 2019 If the market for tea estate workers is competitive, explain the effect of a union on the wage rate and employment. Draw a graph to illustrate your answer.