Pennsylvania corrections officials say Bill Cosby will serve his sentence at a new state prison in the Philadelphia suburbs.  The Department of Corrections provided details of Cosby’s incarceration Wednesday, one day after the 81-year-old comedian was sentenced to three to 10 years for sexual assault.  Cosby will serve his time at SCI Phoenix, about 20 miles from his gated estate. The $400 million prison opened two months ago.  He’s being housed in a single cell near the infirmary. Corrections Secretary John Wetzel says the prison’s long-term goal is to place Cosby in the general population. Under prison policy, he’ll be allowed phone calls and visits and will get a chance to exercise.  Wetzel says the prison is “taking all of the necessary precautions” to ensure the celebrity’s safety.