question: the school psychologist, group therapy, and the school doctor had no answers and had, according to the father, only made a bad thing worse by implying that the boy’s mother had failed in the rearing of her children.
Capitalize this past sentence correctly.
A: The school psychologist, group therapy, and the school doctor had no answers and had, according to the father, only made a bad thing worse by implying that the boy’s mother had failed in the rearing of her children.

question: the mac operating system is the most talked about os among the present generation.
Capitalize this past sentence correctly.
A: The Mac operating system is the most talked about OS among the present generation.

question: 75 all new .psd templates (110 mb), these are not the same templates being recycled all over the net, these are brand new and original creations that fit any type of business or personal websites.
Capitalize this past sentence correctly.
A: 75 all new .PSD Templates (110 MB), these are not the same templates being recycled all over the net, these are brand new and original creations that fit any type of business or personal websites.