Adding placeholder to "CONTACT US" form

[Mrunali01]

I will add placeholder to text-box of Contact us form. For example: I will add the place holder 'Enter your first name' to "First Name"

Please assign this issue to me @DharshiBalasubramaniyam under the label gssoc-extd

[Mrunali01]

Also can I reduce the form size + the image size a bit as the entire form doesn't fit in screen and the send button isn't visible entirely.