Ive got a few questions that I CAN NOT resolve. 1.) Find the value 1 4/9 ....?

(with vertical lines on each side of the fraction)--- 2.) Multiply (-7/8)x(-2/4) ---3.)Classify the Given Number -4/9 a-Integer b-Real c-Whole d-Natural--- 4.)Find the Value of the expression 3x45 divided by 9 - 2 (10-6) -4 divided by 2 ---5.) The octagon rating of gasoline at the gas pump is given by R+M/2 where R is a number measuring the performance of gasoline using the Research Method and M is a number measuring the performance of gasoline using the Motor Method. If a certain gasoline has R=97 and M=91, what is its octane rating?--- 6.)Combine like terms (simplify) 11/14a-1/15b+1/14a-11/15b