Answer: decrease in the demand for printers and a decrease in the quantity supplied of printers.
Step-by-step explanation: Suppose buyers of computers and printers regard the two goods as complements. Then an increase in the price of computers will cause a fall in the price of printers. When the price of a complementary good rise, the consumer buys less of the other good as well. So, a rise in the price of computers will lead to a fall in the demand for printers. The net result will be a fall in the price of printers and a decrease in the quantity supplied of printers.