Please help me with my Statistics homework question!?

Bell Mobility, a wireless telephone carrier, had 44% of their customers with text messaging last year. A Vice-President would like to know if usage has changed. A random sample of 160 customers showed 60 instances where the individual did indeed have text messaging. With this information, using a two tailed test for the null hypothesis of p=0.40, what z value and conclusion would you have if a=0.05?