Answer:
increase , decrease
Step-by-step explanation:
Import tariffs are amount levied on the imports of goods. tariffs makes imports more expensive and discourages import.
if an import tariff is in place for a particular good, the import of that good would reduce and this would increase domestic producers to produce more of the good to meet the demand of the good. so output of domestic producers would increase.
Because output is consumed domestically, exports would reduce.