18. A woman paid €6600 in income tax for the year. She had a tax credit of €4600 and her standard rate cut-off point was €28 000. The standard rate of income tax was 20% and the higher rate was 40%. (i) Calculate her gross tax for the year. (ii) How much income tax did she pay at the standard rate? (iii) How much income tax did she pay at the higher rate? (iv) How much income did she earn in excess of €28 000? (v) What was the woman's gross income for the year?​