Q3)Which of the following describes a switching cost?

Q3)Which of the following describes a switching cost?
a)Sellers find it difficult to stop customers from switching to alternative sellers, so the spend more in order to keep their existing customers.
b)Customers find it difficult to switch to an alternative seller once they have started to buy from one seller.
c)All of these are correct.
d)Customers face added costs due to the advertising expenses of the firm.
q4) The main reason for companies to bundle their product is to:
a)None of these is correct.
b)make new customers stick with the product.
c)extract additional profits from a customer base with homogeneous product demands.
d)extract additional profits from a customer base with heterogeneous product demands.
Q5) If a gym charges a sign-up fee, and then charges a set amount per week as well, this is an example of:
a)bundling.
b)multi-period pricing.
c)block pricing.
d)two-part pricing.