Design a 4-bit counter ( until ) using t-ff and discuss 4 cases for the inputs (x, y) 2, a. if input 00 then the counter counts upward b. if input 01 then counter counts downward c. if input 10 then counter counts only odd numbers. d. if input 11 then counter counts only even numbers.

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton