Merle's spare change jar has exactly 16 u. s. coins, each of which is a 1-cent coin, a 5-cent coin, a 10-cent coin, a 25-cent coin, or a 50-cent coin. if the total value of the coins in the jar is 288 u. s. cents, how many 1-cent coins are in the jar?

(1) the exact numbers of 10-cent, 25-cent, and 50-cent coins among the 16 coins in the jar are, respectively, 6, 5, and 2.
(2) among the 16 coins in the jar there are twice as many 10-cent coins as 1-cent coins.