note: i want answer of this question in 20 minutes

Question 2 Convert the following Infix expressions into Postfix and evaluate them. a) (5 * (((9+8) * (4* 6)) + 7)) b) 6* (5+ (2+3) * 8+3) c) (B^2-4*A*C)^(1/2) d) A*B+ (C-D/E) Where A = 2, B = 3, C = 1, D=4 and E=5