For what value of the constant c$$is the function f$($x$)$continuous on the interval$($$,$$)$wheref$($x$)=\{$cx$2+3$if$$x$14$cx$6$if$$x$>1.$ If the answer in infinity, you can type in INF in the blank.$$ If the answer is negative infinity, you can type $-$INF.$$ If the answer is does not exist, you can type in DNE.$$ Otherwise, write the number as an integer or reduced fraction.