Replying to Macroeconomics help please

i need a better explanation of equilibriums and how other markets are affected by one good either losing or gaining value. please keep in mind complimentary goods and factors of production.

Example:

show why and how the using supply and demand graphs labeled by price (Y) and quantity (X).

there are 5 markets, Wheat, Corn, Pork, Beef, Hamburger Buns

Wheat has lost half of its crops (supply), how does this affect the other 4 markets in terms of

supply (increase or decrease),
demand (increase or decrease),
equilibrium price (increase or decrease),
euilibrium quantity (increase or decrease).

please help!