can you show the working with correct answers

QUESTION 3 Given matrix A=- 9 0 (a) State the values of p and q if A is a skew-symmetrical matrix. [ 2 marks ] (C1, CLO1, MQF LOD 1) (b) Given p =1 &q =-1. i) Find the cofactor of the third row. [ 3 marks ] (C2, CLO1, MQF LOD 1) ii) Hence, find the determinant of matrix A. [ 2 marks ] (C2, CLO1, MQF LOD 1) 0 4 iii) By using properties of determinant, find the value of | 2 -1 - 3 5 O [ 2 marks ] (C2, CLO1, MQF LOD 1) QUESTION 4 -1 Given matrix B= 1 0 1 . Find B- by using elimination row operations. 3 -1 4 [ 7 marks ] (C2, CLO1, MQF LODI)