Small plumber tasks: new seal for leaking tap, fix sink drainage and cancel sink

We need help asap with some small plumber tasks as follows: - One tap that is leaking and probably needs a new rubber seal (first picture below) - 3 sinks with drainage problems (picture 2 and 4 below, as well as the sink to the far left in the first picture) - We also need to remove/cancel a sink from the kitchen (picture 3 below) Please contact us by email with an estimated price and when the work can be done. Thanks!