A. Find the effective length factor of (W 12 x 50) column which has length equal to 20 ft. Assume the column is pin- pin the weak direction (For minor axis) and the two ends connections for strong direction (Major axis) are:1-Pin-pin contention in both directions2-Fixed in -fixed connection 3 - Fixed in -pin connection 4- Fixed-free to translate and rotate (rotation free and translation free) B. Find the effective length of each column for the frame shown below?