A grandfathers clock is calibrated at a temperature of

Question

Compute each parts of given question:

Question: A grandfather's clock is calibrated at a temperature of 21°C. Assume that the pendulum is a thin brass rod of negligible mass with a heavy bob attached to the end.

Part A: On a hot day, when the temperature is 32°C, does the clock run fast or slow?

Part B: How much does it gain or lose in a 24 h period?

I don't know how to get that answer for the above question. Please help! Thanks.