What is the procedure for changing the Coil pack? on 1995 Chevrolet Corsica

Changed plugs & wires. Now getting check engine light. Diag said, failure to fire on cylinder 4. Am thinking it is the coil pack, but not sure how to go about changing it (not in a convenient location). Any help would be appreciated.

Asked by for the 1995 Chevrolet Corsica
1st ck pwr to plug and signal. if its getting pwr and grd you dig to it and repl.its a simple job just time consuming. good luck