Hi Guys, my parents will be applying for a Super Visa and have few questions. If some could help me answer these questions would make my day

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1. Separate forms will be filled out for Father and Mother including checklist. Is it correct?
2. Can I fill the forms using both Pen and Printer. The electronic document doesn't allow me to enter the state/province. It disables the state. Can I write the state with black pen?
3. My father will be filling out all the forms for my mother. So, do my mother need a "Use of Representative" form.
4. As you guys know, Super Visa requires additional documents from the person sponsoring parents/grandparents from back home. Since I am sponsoring my parents, I have only prepared one set of all the documents i.e. 1 copy Notice of Assessment, 1 original Job Letter, 1 original Insurance Policy (which includes both the applicants), and other required documents. Original of these documents will be attached to my dad's application as he's the primary applicant. What about my mother? Do we need to attest all the documents sent by me and have them attached to my mother's application. Or 1 set is ok. My father and mother will apply at the same time. So, they will send all the documents in 1 envelope. The envelope will have all the documents from my side + documents required by the applications. So, considering that I believe it doesn't make sense to do another copy of the same documents. Could someone please clarify this?
Thanks guys. Please share and let's help each other.