carys is checking her tax bill for the last year. the tax rates were as follows: no tax on the first £11 000 of earnings, earnings in excess of £11 000 and up to £43 000 taxed at a rate of 20%, earnings in excess of £43 000 and up to £150 000 taxed at a rate of 40%, earnings over £150 000 taxed at a rate of 45%. last year carys earned £45 600 before tax. how much tax did she pay in total?