Tom and carol are resident aliens, married, and want to file a joint return. they have two children. sydney is 5 years old and a resident alien. benjamin is 2 years old and a u. s. citizen. both children lived with the parents in the united states all year. tom, carol, and sydney have individual taxpayer identification numbers (itins). benjamin has a social security number. tom earned $30,000 in wages. carol had $8,000 in wage income. they had no other income. tom and carol provided all the support for sydney and benjamin. sydney and benjamin attended daycare while tom and carol were at work. tom and carol did not receive dependent care benefits from a dependent care benefits plan or flexible spending account. the daycare center provided the baker's with a statement indicating the amount of $3,250 paid for 2018, their name, address and valid employer identification number. 6. who can tom and carol claim as a qualifying child for the child tax credit? a. sydney b. benjamin c. both sydney and benjamin d. neither sydney or benjamin

Why is the cournot equilibrium an​ equilibrium? a. there are​ short-run barriers to exit in a cournot​ duopoly, so both firms cannot alter their output levels. b. given the other​ firm's level of​ production, both firms are maximizing profits and cannot improve their situation by unilaterally altering their level of output. c. both firms operate at zero profit under a cournot​ equilibrium, so they would face negative profits if they change output. d. both firms operate at minimum​ long-run average cost under a cournot​ equilibrium, so changes to output would reduce​ long-run profits. even if they​ can't collude, why​ don't firms set their outputs at the joint​ profit-maximizing levels​ (i.e., the levels they would have chosen had they​ colluded)? a. given that other firm produces at the collusive​ level, a firm could increase their own profits by increasing output above the collusive level. b. the midpoint of the collusion curve​ (i.e., the collusive​ outcome) lies below the reaction​ curves, so both firms have an incentive to increase output under the cournot duopoly. c. both a and b are correct d. both a and b are incorrect