The demand functions for two products are given below. $p_1,p_2,q_1,$ and $q_2$ are the prices $($in dollars$)$ and quantities for products $1$ and $2.$

$q_1=1800-4p_1+4p_2$

$q_2=1100+4p_1-2p_2$

What is the quantity demanded for each when the price for product $1$ is $$60$ per item and the price for product $2$ is $$30$ per item?

Demand for product $1$

Demand for product $2$ :

Are these two products complementary goods or substitute goods?