State whether the following situations render a marriage void or voidable:

a. Prior existing marriage

b. Parties married in violation of the law prohibited marriage in certain categories of relatives

c. Party was underage at time of marriage

d. Parties never intended to live together as husband wife

e. Party was forced or coerced into the marriage

f. Wife is pregnant by another at the time of marriage and husband is unaware that he is not the father of the child

g. Party was incapable of understanding the nature of marriage at the time of marriage