For question 2 think about the number of input values per neuron which all require a parameter. Then you have a number of neurons. And how many biases do you have?
For question 3 think about the number of input values per filter. Then you have a number of filters. And how many biases do you have now?
That will give you the right answer.
When I tried out these answers in the quiz, however, the grader behaved inconsistently, sometimes approving the right answers, sometimes failing them.
I will notify the people working on the backend. In the meantime, try submitting the right answers and you will pass at some point.