7. For all the functions below, find their answer correctly up to 2 significant digit by using MatLAB 6x +4 x-5 i. 20.7108 when x = 2 12x3-7x+3x+9 ii. (2x 7x*+2x10)(x*+2x+4) Letf(x)=2 x 7x*+2x10. Solve the cubic equation whenf (x)=0. iv. Letf(x)=x*+2x+4=0. Solve the equation Starting at x = -5 find an approximate root of f(x)=x?- 2x2x+5 v. (1.Omarks/markah) 8. Given A= 5 10 15 25 30 35 B= 4 12 6 8 14 16 Determine: i. ii. iii. Subtraction of A' from BT Multiplication of A" andB Element by element multiplication of AAB iv. Sum of A-5 B with result from (iii) (1.5 marks/markah]