The coordinates are
.
Apply midpoint formula: midpoint =
.
Substitute
.

(Add:
)
(Divide:
)
The coordinates are
.
The distance between two points with coordinates
is given by
.
Substitute
.

(Product of two same signs is positive)
(Add:
)
(Evaluate powers:
)
(Add:
)
The midpoint is
and distance is
units.