[1.25]- Problems in general Physics by I E Irodov: Solution by Saket Sir

[1.25]- Problems in general Physics by I E Irodov: Solution by Saket Sir
1.25. A point moves in the plane xy according to the law x = at,
y = at (1. — at), where a and a are positive constants, and t is
time. Find:
(a) the equation of the point's trajectory y (x); plot this function;
(b) the velocity v and the acceleration w of the point as functions
of time;
(c) the moment t, at which the velocity vector forms an angle It/4
with the acceleration vector_

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Sir than u
Im preparing 4 JEE advanced and Im in 11th standard
Ur solutiions keep boosting me up whenever i do not get them