Assume the following: A has two children, B and C. A has another child, Z. B predeceased A, leaving child D. Z predeceases A leaving no descendants. C predeceased A, leaving children, E and F. F has a child. F and F's child, I, survives A. E predeceased A, leaving children, G and H. Suppose A dies intestate, leaving no surviving spouse. How is A's estate distributed under the English per stirpes system? Under the modern per stirpes system? Under the 1990 UPC?