plz answer all parts of the question

1. Identify the major interaction (pick one) from the following list: - Hydrophobic interactions - Electrostatic attraction - Electrostatic repulsion - Hydrogen bonding - van der Waals interactions Albumin (pI5) is adsorbing to Teflon surface (uncharged, contact angle =115) at pH5. (a) What is the major interaction for this adsorption process? (b) What is the major interaction between albumin and Teflon surface if you change the pH to 7.2 ? (c) What is the major interaction of Albumin on highly sulfonated silica (charged, contact angle =10) with the buffer at pH7.2