Explain the relationship between inflation and unemployment using the Phillips curve. Is there a trade-off in the long run?

How to lay out the answer. Follow the frame, then write it in your own words.

1 · Define unemployment and its measurement. Labour force, unemployment rate (e.g. 200,000 ÷ 4,000,000 = 5%), natural rate.
2 · Outline the types. Frictional, structural, cyclical, seasonal, disguised.
3 · Introduce the original Phillips curve. A. W. Phillips (1958): low unemployment came with fast wage inflation.
4 · Draw the short-run curve. [Diagram: inflation on the vertical axis, unemployment on the horizontal; a downward-sloping SRPC]
5 · Explain the breakdown and expectations. 1970s stagflation; Friedman-Phelps: higher expected inflation shifts the SRPC up.
6 · Draw the long-run curve. [Diagram: vertical LRPC at the natural rate, with SRPC1 and SRPC2 shifting up]
7 · Sri Lankan business link. Seasonal jobs in tourism and agriculture; skills mismatches that firms fix with training.
8 · Conclude. There is a short-run trade-off but no lasting one; lasting cuts in unemployment need supply-side policies.

Scoring tip: Two diagrams, SRPC and LRPC, plus one sentence on expectations, carry most of the marks.