Using the Chi-square Goodness of fit test?

#1
Hi guys, I am a first year statistics students and I'm a bit shaky on the subject. Please help me with the question below. Thanks!

Question6

A banker wanted to know whether the proportions of African American, Asian, Caucasian, Hispanic and Other ethnicities for the customers in her bank were significantly different from the countrywide population. The percentages for the county was African-American 12%, Asian 6%, Hispanic 10%, White 68%, Other 4%. Thee frequencies observed in her bank were: African American 600, Asian 100, Hispanic 500, White 1200, Other 300. Using the Chi-square Goodness of fit test, determine if there is a significant difference? (Show and label each step)