there,

I was unable to solve the following questions, please help me.

1)A is a point on the X-axis and B is a point on the Y-axis such that:

4(OA) + 7(OB) = 20, where O is the origin. Find the equation of the locus of the midpoint P of Segment AB.

2)Find the equation of the locus of the midpoint P of Segment AQ, if:

A= (-1,2) and Q is a point on the locus $\displaystyle y^2 = 12x$