A government issues $$8000000$ of serial bonds paying interest at

$=6\%,$ of which $$2000000$ is redeemed in $20$ years, $$4000000$ is redeemed in $25$ years and $$2000000$ is redeemed in $30$ years. If the price of the bounds yields investors

$=7\%,$ what is the value of the bonds in $22$ years?