Data Sufficiency

Dear All

Plz hep with the explanations of the following.Thanks

q1) Is m+z >0

1)m-3z >0

2)4z-m >0

q2)Are x and y both positive

1) 2x-2y = 1

2) x/y > 1

q3) In xy plane what is the y-interceptof line

1)Slope of line l is 3 times the y intercept

2) x intercept of line is -1/3

q4) Six countries in a certain region sent a total of 75 representatives to sn international congress and no two countries sent the same number of people.Of the sic countries A sent the second greatest number of people.Did A send atleast 10m representatives??

1)One of the countries sent 41

2)Country A sent fewer than 12 representatives

q5)On the number line the distance between x and y is greater than x and z.Does z lie between x and y o the number line

1)xyz<0

2)xy<0