Complete the sentences with the suitable idioms.

Choose the correct option.

This maths problem is [the icing on the cake|a piece of cake|like hot cakes] for me; I can solve it in seconds.

She wants to save money but also go on a luxurious vacation. She can't [sell like hot cakes|be a piece of cake|have her cake and eat it] too.

I was already excited to go on vacation, but winning the lottery was [the icing on the cake|my cake and eat it|a piece of cake].

The new phone model is [a piece of cake|selling like hot cakes|having a cake and eat it]; everyone wants to get their hands on it.