I have 2 specific heat chemistry questions and need some help?

1.) 40.0 mL of 1.0 M NaOH solution whose initial temperature is 25.4 Celsius is mixed with 60.0 mL of 1.0 M HCl solution in a calorimeter. The final temperature of the mixture was found to be 30.8 Celsius. If the heat capacity of the calorimeter is 21.0 J/Celsius and if the density of the salt solution is 1.00 g/mL, what is the enthalpy change in kilojoules per mole for this reaction? The specific heat of salt solution is 4.01 J/g*Celsius.

2.) 40.0 grams of water at 64.2 Celsius is added to 60.0 grams of water at 25.0 Celsius in a calorimeter. The final temperature of this solution was found to be 39.6 Celsius. What is the heat capacity of the calorimeter?

Any help is appreciated on this.

Thanks in advance.