A block is projected from bottom of an inclined plane with some velocity as shown in figure.

A block is projected from bottom of an inclined plane with some velocity as shown in figure. If initial velocity of block is 22 m/sec and μ = (2√3)/5 then find.
Time to reach at maximum height.
(a) 4 sec (b) 2 sec
(c) 22/5 sec (d) 22/6 sec

Friction force acting on block at maximum height.
(a) 60 N (b) 50 N
(c) zero (d) none