A $20\mathrm{.}0$ m long copper wire, $2\mathrm{.}35$ mm in diameter including insulation, is tightly wrapped in a single layer with adjacent coils touching, to form a solenoid of diameter $2\mathrm{.}50$ cm$.$ What is the field at the center when the current in the wire is $28\mathrm{.}8$ A$?$ Give the field in Teslas.