$4.$ Dominic and Magalle have been married for five years and have three children, aged four, seven and nine. Dominic and Magalie are divorcing and Magalie has been ordered to pay child support, until the youngest reaches age $20.$ The court has specified her monthly obligation to be $$2,000.$

What type of insurance provides the most cost$-$effective solution and how much insurance is needed?

$1.$ Whole life insurance with coverage of $$600,000.$

$2.$ Term$-$to$-100$ with coverage of $$600,000.$

$3.25-$year term life insurance with coverage of $$480,000.$

$4.20-$year term life insurance with coverage of $$480,000.$