Jennifer made interestminusfree gift loans to each of her four children as$$ follows:

$(1)$ John borrowed$$ $$9,500$ to purchase an automobile. His net investment income is$$ $$1,500.$

$(2)$ Rick borrowed$$ $$50,000$ to purchase a trailer. His net investment income is$$ $$900.$

$(3)$ Bert borrowed$$ $$25,000$ to purchase stock. His net investment income is$$ $$1,200.$

$(4)$ Elizabeth borrowed$$ $$110,000$ to purchase a home. Her net investment income is$$ $$800.$

Assuming a$5\%$ interest$$ rate, on which loans must interest be$$ imputed?