Hi, I'm a Professional Web Developer with 8 years of experience.
What you need seems straightforward. Can do this tomorrow (it's 1AM over here, and i still have some work to do before i go to bed). You asked about explaining how i'll do it, task #1 & #2 CSS, and task 3, by editing how the slide works. Also have a ton of mobile dev experience (websites, not applications, so exactly what you need). Also have a ton of experience with Wordpress, have done 40+ Wordpress based sites in the past year alone.
Also I'm on Skype a lot, 12+ hours a day usually, including weekends. Can help you with future issues as well if you're ever in need. Also my English is pretty good.
If you have any questions please do no hesitate to ask through PM system.