Use ANNEXURE C to answer the questions that follow. 4.2.1 Arrange the gross monthly salaries for post level 1 in ascending order of (2) value. (2) 4.2.2 Write down the modal gross monthly salary. 4.2.3 The starting annual gross salary (excluding bonuses) of a fully qualified teacher is R262 896. Nobuntu stated that this school has all fully qualified teachers. (3) 4.2.4 Verify, showing ALL calculations, whether her statement is valid. Determine (in simplified fractional form) the probability of randomly selecting a teacher with deductions less than the mean total deductions. 4.2.5 The arranged nett salaries are as follows: 14977 15 036 157 770 15 801 16 644 17 349 17 575 18 471 18 736 18 817 23 971 25 975 30 780 35 235 54 881 QUESTION 4.2 (a) Determine the inter quartile range (IQR) of the nett salaries. (b) Explain the significance of the IQR calculated in Question 4.2.5 (a). MONTHLY TEACHER SALARIES (IN RAND) (5) 47 (4) (2) Teacher Total A Teacher i 21.908 4.559 17 349 B Teacher 1 28 477 9.660 18 817 C Teacher 1 19 095 4 059 15 036 D Principal 4 77 350 22 469 54 881 E Teacher I 25 904 10 260 16 644 F Teacher 1 28 208 9472 18 736 G Teacher 1 28 477 10 006 18 471 H Departmental head 2 45 010 22 039 23.971 J Teacher 1 21 908 6 107 15 801 K Teacher 1. 39.992 14.017 25 975 L Teacher 1 24 133 8363 15 770 M Departmental head 2 42 778 11.998 30 780 . N Teacher 1 21.908 4.333 17 575 P Deputy Principal 3 54 523 19288 35 235 ​